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Volumn 14, Issue 7, 1999, Pages 1710-1716

Human male infertility and Y chromosome deletions: Role of the AZF-candidate genes DAZ, RBM and DFFRY

Author keywords

DAZ; DFFRY; Male infertility; RBM; Y chromosome

Indexed keywords

ARTICLE; AZOOSPERMIA; CLINICAL TRIAL; CONTROLLED CLINICAL TRIAL; CONTROLLED STUDY; DISEASE SEVERITY; GENE DELETION; HUMAN; MAJOR CLINICAL STUDY; MALE; MALE INFERTILITY; OLIGOSPERMIA; POLYMERASE CHAIN REACTION; RELATIVE; SERTOLI CELL; SPERMATOGENESIS; TESTIS DISEASE; Y CHROMOSOME;

EID: 0032787762     PISSN: 02681161     EISSN: None     Source Type: Journal    
DOI: 10.1093/humrep/14.7.1710     Document Type: Article
Times cited : (145)

References (46)
  • 1
    • 0031682224 scopus 로고    scopus 로고
    • Evolution of the DAZ gene family suggests that Y-linked DAZ plays a little, or a limited, role in spermatogenesis but underlines a recent African origin for human population
    • Agulnik, A.I., Zharkikh, A., Boettger-Tong, H. et al. (1998) Evolution of the DAZ gene family suggests that Y-linked DAZ plays a little, or a limited, role in spermatogenesis but underlines a recent African origin for human population. Hum. Mol. Genet., 1, 1371-1377.
    • (1998) Hum. Mol. Genet. , vol.1 , pp. 1371-1377
    • Agulnik, A.I.1    Zharkikh, A.2    Boettger-Tong, H.3
  • 3
    • 0030726761 scopus 로고    scopus 로고
    • Multiple functional copies of the RBM gene family, a spermatogenesis candidate on the human Y chromosome
    • Chai, N.N., Salido, B.C. and Yen, P.H. (1997) Multiple functional copies of the RBM gene family, a spermatogenesis candidate on the human Y chromosome. Genomics, 45, 355-361.
    • (1997) Genomics , vol.45 , pp. 355-361
    • Chai, N.N.1    Salido, B.C.2    Yen, P.H.3
  • 4
    • 0032522156 scopus 로고    scopus 로고
    • Structure and organization of the RBMY genes on the human Y chromosome: Translocation and amplification of an ancestral autosomal hnRNPG gene
    • Chai, N.N., Zhou, H., Hernandez, J. et al. (1998) Structure and organization of the RBMY genes on the human Y chromosome: translocation and amplification of an ancestral autosomal hnRNPG gene. Genomics, 49, 283-289.
    • (1998) Genomics , vol.49 , pp. 283-289
    • Chai, N.N.1    Zhou, H.2    Hernandez, J.3
  • 5
    • 0028059593 scopus 로고
    • Human male fertility - Y linked genes and spermatogenesis
    • Chandley, A.C. and Cooke, H.J. (1994) Human male fertility - Y linked genes and spermatogenesis. Hum. Mot. Genet., 3, 1449-1452.
    • (1994) Hum. Mot. Genet. , vol.3 , pp. 1449-1452
    • Chandley, A.C.1    Cooke, H.J.2
  • 6
    • 0342941126 scopus 로고    scopus 로고
    • RNA-binding proteins and human male infertility
    • Cooke, H. and Elliott, D.J. (1997) RNA-binding proteins and human male infertility. Trends Genet., 13, 87-89.
    • (1997) Trends Genet. , vol.13 , pp. 87-89
    • Cooke, H.1    Elliott, D.J.2
  • 7
    • 0031053390 scopus 로고    scopus 로고
    • A human candidate spermatogenesis gene, RBM1, is conserved and amplified on the marsupial Y chromosome
    • Delbridge, M.L., Harry, J.L., Toder, R. et al. (1997) A human candidate spermatogenesis gene, RBM1, is conserved and amplified on the marsupial Y chromosome. Nature Genet., 15, 131-136.
    • (1997) Nature Genet. , vol.15 , pp. 131-136
    • Delbridge, M.L.1    Harry, J.L.2    Toder, R.3
  • 8
    • 0031959985 scopus 로고    scopus 로고
    • Interstitial and terminal deletion of chromosome Y in a male individual with cryptozoospermia
    • Duell, T., Mathews, S., Wunderlich, B. et al. (1998) Interstitial and terminal deletion of chromosome Y in a male individual with cryptozoospermia. Mol. Hum. Reprod., 4, 325-331.
    • (1998) Mol. Hum. Reprod. , vol.4 , pp. 325-331
    • Duell, T.1    Mathews, S.2    Wunderlich, B.3
  • 9
    • 0029900958 scopus 로고    scopus 로고
    • Meiotic cell cycle requirement for a fly homologue of human Deleted in Azoospermia
    • Eberhart, C.G., Maines, J.Z. and Wasserman, S.A. (1996) Meiotic cell cycle requirement for a fly homologue of human Deleted in Azoospermia. Nature, 381, 783-785.
    • (1996) Nature , vol.381 , pp. 783-785
    • Eberhart, C.G.1    Maines, J.Z.2    Wasserman, S.A.3
  • 10
    • 12644310287 scopus 로고    scopus 로고
    • Expression of RBM in the nuclei of human germ cells is dependent on a critical region of the Y chromosome long arm
    • Elliott, D.J., Millar, M.R., Oghene, K. et al. (1997) Expression of RBM in the nuclei of human germ cells is dependent on a critical region of the Y chromosome long arm. Proc. Natl Acad. Sei. USA, 94, 3848-3853.
    • (1997) Proc. Natl Acad. Sei. USA , vol.94 , pp. 3848-3853
    • Elliott, D.J.1    Millar, M.R.2    Oghene, K.3
  • 11
    • 0031751952 scopus 로고    scopus 로고
    • Dynamic changes in the subnuclear organisation of pre-mRNA splicing proteins and RBM during human germ cell development
    • Elliott, D.J., Oghene, K., Makarov, G. et al. (1998) Dynamic changes in the subnuclear organisation of pre-mRNA splicing proteins and RBM during human germ cell development. J. Cell Sei., Ill, 1255-1265.
    • (1998) J. Cell Sei., Ill , pp. 1255-1265
    • Elliott, D.J.1    Oghene, K.2    Makarov, G.3
  • 12
    • 0026446292 scopus 로고
    • Assessment of testicular cytology by fine needle aspiration as a diagnostic parameter in the evaluation of the oligozoospermic subject
    • Foresta, C. and Varotto, A. (1992) Assessment of testicular cytology by fine needle aspiration as a diagnostic parameter in the evaluation of the oligozoospermic subject. Fertil. Steril., 58, 1028-1033.
    • (1992) Fertil. Steril. , vol.58 , pp. 1028-1033
    • Foresta, C.1    Varotto, A.2
  • 13
    • 0026524482 scopus 로고
    • Assessment of testicular cytology by fine needle aspiration as a diagnostic parameter in the evaluation of the azoospermic subject
    • Foresta, C., Varotto, A. and Scandellari, C. (1992) Assessment of testicular cytology by fine needle aspiration as a diagnostic parameter in the evaluation of the azoospermic subject. Fertil. Steril., 57, 858-865.
    • (1992) Fertil. Steril. , vol.57 , pp. 858-865
    • Foresta, C.1    Varotto, A.2    Scandellari, C.3
  • 14
    • 0028810917 scopus 로고
    • Diagnostic and clinical features in azoospermia
    • Foresta, C., Ferlin, A., Bettella, A. et al. (1995) Diagnostic and clinical features in azoospermia. Clin. Endocrinol., 43, 537-543.
    • (1995) Clin. Endocrinol. , vol.43 , pp. 537-543
    • Foresta, C.1    Ferlin, A.2    Bettella, A.3
  • 15
    • 0030904952 scopus 로고    scopus 로고
    • Y-chromosome deletions in idiopathic severe testiculopathies
    • Foresta, C., Ferlin, A., Garolla, A. et al. (1997) Y-chromosome deletions in idiopathic severe testiculopathies. J. Clin. Endocrinol. Metab., 82, 1075-1080.
    • (1997) J. Clin. Endocrinol. Metab. , vol.82 , pp. 1075-1080
    • Foresta, C.1    Ferlin, A.2    Garolla, A.3
  • 16
    • 0031889383 scopus 로고    scopus 로고
    • High frequency of welldefined Y-chromosome deletions in idiopathic Sertoli cell-only syndrome
    • Foresta, C., Ferlin, A., Garolla, A. et al. (1998) High frequency of welldefined Y-chromosome deletions in idiopathic Sertoli cell-only syndrome. Hum. Reprod., 13, 302-307.
    • (1998) Hum. Reprod. , vol.13 , pp. 302-307
    • Foresta, C.1    Ferlin, A.2    Garolla, A.3
  • 17
    • 0030883296 scopus 로고    scopus 로고
    • Submicroscopic deletions in the Y chromosome of infertile men
    • Girardi, S.K., Mielnik, A. and Schlegel, P.N. (1997) Submicroscopic deletions in the Y chromosome of infertile men. Hum. Reprod., 12, 1635-1641.
    • (1997) Hum. Reprod. , vol.12 , pp. 1635-1641
    • Girardi, S.K.1    Mielnik, A.2    Schlegel, P.N.3
  • 18
    • 0030975308 scopus 로고    scopus 로고
    • High resolution fluorescence in situ hybridization of human Y-linked genes on released chromatin
    • Gläser, B., Herl, T., Taylor, K. et al. (1997) High resolution fluorescence in situ hybridization of human Y-linked genes on released chromatin. Chrom. Res., 5, 23-30.
    • (1997) Chrom. Res. , vol.5 , pp. 23-30
    • Gläser, B.1    Herl, T.2    Taylor, K.3
  • 19
    • 0031913144 scopus 로고    scopus 로고
    • DAZ (Deleted in Azoospermia) genes encode proteins located in human late spermatids and in sperm tails
    • Habcrmann, B., Mi, H.F., Edelmann, A. et al. (1998) DAZ (Deleted in Azoospermia) genes encode proteins located in human late spermatids and in sperm tails. Hum. Reprod., 13, 363-368.
    • (1998) Hum. Reprod. , vol.13 , pp. 363-368
    • Habcrmann, B.1    Mi, H.F.2    Edelmann, A.3
  • 20
    • 0028114292 scopus 로고
    • PCR analysis of the Y chromosome long arm in azoospermic patients: Evidence for a second locus required for spermatogenesis
    • Kobayashi, K., Mizumo, K., Hida, A. et a!. (1995) PCR analysis of the Y chromosome long arm in azoospermic patients: evidence for a second locus required for spermatogenesis. Hum. Mol. Genet., 3, 1965-1967.
    • (1995) Hum. Mol. Genet. , vol.3 , pp. 1965-1967
    • Kobayashi, K.1    Mizumo, K.2    Hida, A.3
  • 21
    • 0030725069 scopus 로고    scopus 로고
    • Functional coherence of the human Y chromosome
    • Lahn, B.T. and Page, D.C. (1997) Functional coherence of the human Y chromosome. Science, 278, 675-680.
    • (1997) Science , vol.278 , pp. 675-680
    • Lahn, B.T.1    Page, D.C.2
  • 22
    • 7344251712 scopus 로고    scopus 로고
    • Expression of DAZ (deleted in azoospermia), DAZL1 (DAZ-like) and protamine-2 in testis and its application for diagnosis of spermatogenesis in non-obstructive azoospermia
    • Lee, J.H., Lee, D.R., Yoon, S.J. et al. (1998) Expression of DAZ (deleted in azoospermia), DAZL1 (DAZ-like) and protamine-2 in testis and its application for diagnosis of spermatogenesis in non-obstructive azoospermia. Mol. Hum. Reprod., 4, 827-834.
    • (1998) Mol. Hum. Reprod. , vol.4 , pp. 827-834
    • Lee, J.H.1    Lee, D.R.2    Yoon, S.J.3
  • 23
    • 0031849301 scopus 로고    scopus 로고
    • Y chromosome microdeletions, in azoospermic or near-azoospermic subjects, are located in the AZFc (DAZ) subregion
    • Liow, S.L., Ghadessy, F.J., Ng, S.C. et al. (1998) Y chromosome microdeletions, in azoospermic or near-azoospermic subjects, are located in the AZFc (DAZ) subregion. Mol. Hum. Reprod., 4, 763-768.
    • (1998) Mol. Hum. Reprod. , vol.4 , pp. 763-768
    • Liow, S.L.1    Ghadessy, F.J.2    Ng, S.C.3
  • 24
    • 0027715823 scopus 로고
    • A Y chromosome gene family with RNA-binding protein homology: Candidates for the azoospermia factor AZF controlling human spermatogenesis
    • Ma, K., Inglis, J.D., Sharkey, A. et al. (1993) A Y chromosome gene family with RNA-binding protein homology: candidates for the azoospermia factor AZF controlling human spermatogenesis. Cell, 75, 1287-1295.
    • (1993) Cell , vol.75 , pp. 1287-1295
    • Ma, K.1    Inglis, J.D.2    Sharkey, A.3
  • 25
    • 7344222765 scopus 로고    scopus 로고
    • The mouse Y chromosome interval necessary for spermatogonial proliferation is gene dense with syntenic homology to the human AZFa region
    • Mazeyrat, S., Sant, N., Sargent, C.A. et al. (1998) The mouse Y chromosome interval necessary for spermatogonial proliferation is gene dense with syntenic homology to the human AZFa region. Hum. Mol. Genet., 7, 1713-1724.
    • (1998) Hum. Mol. Genet. , vol.7 , pp. 1713-1724
    • Mazeyrat, S.1    Sant, N.2    Sargent, C.A.3
  • 26
    • 0031037973 scopus 로고    scopus 로고
    • Expression of DAZ, an Azoospermia factor candidate, in human spermatogonia
    • Menke, D.B., Mutter, G.L. and Page, D.C. (1997) Expression of DAZ, an Azoospermia factor candidate, in human spermatogonia. Am. J. Hum. Genet., 60, 237-240.
    • (1997) Am. J. Hum. Genet. , vol.60 , pp. 237-240
    • Menke, D.B.1    Mutter, G.L.2    Page, D.C.3
  • 27
    • 0030914159 scopus 로고    scopus 로고
    • Azoospermic men with deletion of the DAZ gene cluster are capable of completing spermatogenesis: Fertilization, normal embryonic development and pregnancy occur when retrieved testicular spermatozoa are used for intracytoplasmic sperm injection
    • Mulhall, J.P., Reijo, R., Alagappan, R. et al. (1997) Azoospermic men with deletion of the DAZ gene cluster are capable of completing spermatogenesis: fertilization, normal embryonic development and pregnancy occur when retrieved testicular spermatozoa are used for intracytoplasmic sperm injection. Hum. Reprod., 12, 503-508.
    • (1997) Hum. Reprod. , vol.12 , pp. 503-508
    • Mulhall, J.P.1    Reijo, R.2    Alagappan, R.3
  • 28
    • 9244243681 scopus 로고    scopus 로고
    • Substantial prevalence of microdeletions of the Y-chromosome in infertile men with idiopathic azoospermia and oligozoospermia detected using a sequence-tagged sitebased mapping strategy
    • Najmabadi, H., Huang, V., Yen, P. et al. (1996a) Substantial prevalence of microdeletions of the Y-chromosome in infertile men with idiopathic azoospermia and oligozoospermia detected using a sequence-tagged sitebased mapping strategy. J. Clin. Endocrinol. Metab., 81, 1347-1352.
    • (1996) J. Clin. Endocrinol. Metab. , vol.81 , pp. 1347-1352
    • Najmabadi, H.1    Huang, V.2    Yen, P.3
  • 29
    • 0029931261 scopus 로고    scopus 로고
    • Genomic structure of a Y-specific ribonucleic acid binding motif-containing gene: A putative candidate for a subset of male infertility
    • Najmabadi, H., Chai, N.N., Kapali, A. et al. (1996b) Genomic structure of a Y-specific ribonucleic acid binding motif-containing gene: a putative candidate for a subset of male infertility. J. Clin. Endocrinol. Metab., 81, 2159-2164.
    • (1996) J. Clin. Endocrinol. Metab. , vol.81 , pp. 2159-2164
    • Najmabadi, H.1    Chai, N.N.2    Kapali, A.3
  • 30
    • 0031050740 scopus 로고    scopus 로고
    • Microdeletions in the Y chromosome of infertile men
    • Pryor, J.L., Kent-First, M., Muallem, A. et al. (1997) Microdeletions in the Y chromosome of infertile men. N. Engl. J. Med., 336, 534-539.
    • (1997) N. Engl. J. Med. , vol.336 , pp. 534-539
    • Pryor, J.L.1    Kent-First, M.2    Muallem, A.3
  • 31
    • 0030253042 scopus 로고    scopus 로고
    • Polymerase chain reaction screening for Y chromosome microdeletions: A first step towards the diagnosis of genetically-determined spermatogenic failure in men
    • Qureshi, S.J., Ross, A.R., Ma, K. et al. (1996) Polymerase chain reaction screening for Y chromosome microdeletions: a first step towards the diagnosis of genetically-determined spermatogenic failure in men. Mol. Hum. Reprod., 2, 775-779.
    • (1996) Mol. Hum. Reprod. , vol.2 , pp. 775-779
    • Qureshi, S.J.1    Ross, A.R.2    Ma, K.3
  • 32
    • 0029088061 scopus 로고
    • Diverse spermatogenic defects in humans caused by Y chromosome deletions encompassing a novel RNAbinding protein gene
    • Reijo, R., Lee, T., Salo, P. et al. (1995) Diverse spermatogenic defects in humans caused by Y chromosome deletions encompassing a novel RNAbinding protein gene. Nature Genet., 10, 383-393.
    • (1995) Nature Genet. , vol.10 , pp. 383-393
    • Reijo, R.1    Lee, T.2    Salo, P.3
  • 33
    • 0029871858 scopus 로고    scopus 로고
    • Severe oligozoospermia resulting from deletions of azoospermia factor gene on Y chromosome
    • Reijo, R., Alagappan, R.K., Patrizio, P. et al. (1996) Severe oligozoospermia resulting from deletions of azoospermia factor gene on Y chromosome. Lancet, 347, 1290-1293.
    • (1996) Lancet , vol.347 , pp. 1290-1293
    • Reijo, R.1    Alagappan, R.K.2    Patrizio, P.3
  • 34
    • 0031746185 scopus 로고    scopus 로고
    • High fertilization rate in conventional in-vitro fertilization utilizing spermatozoa from an oligozoospermic subject presenting microdeletions of the Y chromosome long arm
    • Rossato, M., Ferlin, A., Garolla, A. et al. (1998) High fertilization rate in conventional in-vitro fertilization utilizing spermatozoa from an oligozoospermic subject presenting microdeletions of the Y chromosome long arm. Mol. Hum. Reprod., 4, 473-476.
    • (1998) Mol. Hum. Reprod. , vol.4 , pp. 473-476
    • Rossato, M.1    Ferlin, A.2    Garolla, A.3
  • 35
    • 0030292382 scopus 로고    scopus 로고
    • The DAZ gene cluster on the human Y chromosome arose from an autosomal gene that was transposed, repeatedly amplified and pruned
    • Saxena, R., Brown, L., Hawkins, T. et al. (1996) The DAZ gene cluster on the human Y chromosome arose from an autosomal gene that was transposed, repeatedly amplified and pruned. Nature Genet., 14, 292-299.
    • (1996) Nature Genet. , vol.14 , pp. 292-299
    • Saxena, R.1    Brown, L.2    Hawkins, T.3
  • 36
    • 0031024316 scopus 로고    scopus 로고
    • Screening for deletions of the Y chromosome involving the DAZ (Deleted in AZoospermia) gene in azoospermia and severe oligozoospermia
    • Simoni, M., Gromoll, J., Dwomiczak, B. et al. (1997) Screening for deletions of the Y chromosome involving the DAZ (Deleted in AZoospermia) gene in azoospermia and severe oligozoospermia. Fertil. Steril., 67, 542-547.
    • (1997) Fertil. Steril. , vol.67 , pp. 542-547
    • Simoni, M.1    Gromoll, J.2    Dwomiczak, B.3
  • 37
    • 0029965983 scopus 로고    scopus 로고
    • Microdeletions in interval 6 of the human Y chromosome detected by STS-PCR in 6 of 33 patients with idiopathic oligo-azoospermia
    • Stuppia, L., Mastroprimiano, G., Calabrese, G. et al. (1996) Microdeletions in interval 6 of the human Y chromosome detected by STS-PCR in 6 of 33 patients with idiopathic oligo-azoospermia. Cytogenet. Cell. Genet., 72, 155-158.
    • (1996) Cytogenet. Cell. Genet. , vol.72 , pp. 155-158
    • Stuppia, L.1    Mastroprimiano, G.2    Calabrese, G.3
  • 38
    • 16944363366 scopus 로고    scopus 로고
    • Clustering of Y chromosome deletions in subinterval E of interval 6 supports the existence of an olieozoospermia critical region outside the DAZ gene
    • Stuppia, L., Gatta, V., Mastroprimiano, G. et al. (1997) Clustering of Y chromosome deletions in subinterval E of interval 6 supports the existence of an olieozoospermia critical region outside the DAZ gene. J. Med. Genet., 34, 881-883.
    • (1997) J. Med. Genet. , vol.34 , pp. 881-883
    • Stuppia, L.1    Gatta, V.2    Mastroprimiano, G.3
  • 39
    • 0017119580 scopus 로고
    • Localization of factors controlling spermatogenesis in the nonfluorescent portion of the human Y chromosome long arm
    • Tiepolo, L. and Zuffardi, O. (1976) Localization of factors controlling spermatogenesis in the nonfluorescent portion of the human Y chromosome long arm. Hum. Genet., 34, 119-124.
    • (1976) Hum. Genet. , vol.34 , pp. 119-124
    • Tiepolo, L.1    Zuffardi, O.2
  • 40
    • 0030634920 scopus 로고    scopus 로고
    • Absence of DAZ gene mutations in cases of non;obstructed azoospermia
    • Vereb, M., Agulnik, A.I., Houston, J.T. et al. (1997) Absence of DAZ gene mutations in cases of non;obstructed azoospermia. Mol. Hum. Reprod., 3, 55-59.
    • (1997) Mol. Hum. Reprod. , vol.3 , pp. 55-59
    • Vereb, M.1    Agulnik, A.I.2    Houston, J.T.3
  • 41
    • 0007272350 scopus 로고    scopus 로고
    • Human Y chromosome azoospermia factors (AZF) mapped to different subregions in Yqll
    • Vogt, P.H., Edelmann, A., Kirsch, S. et al. (1996) Human Y chromosome azoospermia factors (AZF) mapped to different subregions in Yqll. Hum. Mol. Genet., 5, 933-943.
    • (1996) Hum. Mol. Genet. , vol.5 , pp. 933-943
    • Vogt, P.H.1    Edelmann, A.2    Kirsch, S.3
  • 42
    • 21544466733 scopus 로고    scopus 로고
    • Report of the third international workshop on Y chromosome mapping 1997
    • Vogt, P.H., Affara, N., Davey, P. et al. (1997) Report of the third international workshop on Y chromosome mapping 1997. Cytogenet. Cell. Genet., 79, 1-20.
    • (1997) Cytogenet. Cell. Genet. , vol.79 , pp. 1-20
    • Vogt, P.H.1    Affara, N.2    Davey, P.3
  • 43
    • 0026756965 scopus 로고
    • The human Y chromosome: A 43-interval map based on naturally occurring deletions
    • Vollrath, D., Foote, S., Hilton, A. et al. (1992) The human Y chromosome: a 43-interval map based on naturally occurring deletions. Science, 258,52-59.
    • (1992) Science , pp. 52-59
    • Vollrath, D.1    Foote, S.2    Hilton, A.3
  • 45
    • 0032533919 scopus 로고    scopus 로고
    • A long-range restriction map of deletion interval 6 of the human Y chromosome: A region frequently deleted in azoospermic males
    • Yen, P.H. (1998) A long-range restriction map of deletion interval 6 of the human Y chromosome: a region frequently deleted in azoospermic males. Genomics, 54, 5-12.
    • (1998) Genomics , vol.54 , pp. 5-12
    • Yen, P.H.1
  • 46
    • 9844260065 scopus 로고    scopus 로고
    • The human DAZ genes, a putative male infertility factor on the Y chromosome, are highly polymorphic in the DAZ repeat regions
    • Yen, P.H., Chai, N.N. and Salido, E.C. (1997) The human DAZ genes, a putative male infertility factor on the Y chromosome, are highly polymorphic in the DAZ repeat regions. Mflinm. Genome, 8, 756-759.
    • (1997) Mflinm. Genome , vol.8 , pp. 756-759
    • Yen, P.H.1    Chai, N.N.2    Salido, E.C.3


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