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Volumn 61, Issue 6 SUPPL., 1995, Pages

Dietary oils, serum lipoproteins, and coronary heart disease

Author keywords

cholesterol; Dietary fatty acids; fats; humans; oils; serum lipoproteins

Indexed keywords

CARBOHYDRATE; CHOLESTEROL; DOCOSAHEXAENOIC ACID; EDIBLE OIL; FATTY ACID; FISH OIL; HIGH DENSITY LIPOPROTEIN; ICOSAPENTAENOIC ACID; LAURIC ACID; LIPID; LIPOPROTEIN; LIPOPROTEIN A; LOW DENSITY LIPOPROTEIN; MONOUNSATURATED FATTY ACID; MYRISTIC ACID; OLEIC ACID; OLIVE OIL; PALMITIC ACID; POLYUNSATURATED FATTY ACID; SATURATED FATTY ACID; STEARIC ACID; TRIACYLGLYCEROL;

EID: 0029071159     PISSN: 00029165     EISSN: None     Source Type: Journal    
DOI: 10.1093/ajcn/61.6.1368S     Document Type: Review
Times cited : (218)

References (52)
  • 1
    • 0026740415 scopus 로고
    • Effect of dietary fatty acids on serum lipids and lipoproteins - A meta-analysis of 27 trials
    • Mensink RP, Katan MB. Effect of dietary fatty acids on serum lipids and lipoproteins - a meta-analysis of 27 trials. Arterioscler Thromb 1992;12:911-9.
    • (1992) Arterioscler Thromb , vol.12 , pp. 911-919
    • Mensink, R.P.1    Katan, M.B.2
  • 2
    • 0019800564 scopus 로고
    • Towards an improved lipid-lowering diet: Additive effects of changes in nutrient intake
    • Lewis B, Hammet F, Katan MB, et al. Towards an improved lipid-lowering diet: additive effects of changes in nutrient intake. Lancet 1981;2:1310-3.
    • (1981) Lancet , vol.2 , pp. 1310-1313
    • Lewis, B.1    Hammet, F.2    Katan, M.B.3
  • 3
    • 0344230733 scopus 로고
    • Dietary saturated triacylglycerols suppress hepatic low density lipoprotein receptor activity in the hamster
    • Spady DK, Dietschy JM. Dietary saturated triacylglycerols suppress hepatic low density lipoprotein receptor activity in the hamster. Proc Natl Acad Sci U S A 1985;82:4526-30.
    • (1985) Proc Natl Acad Sci U S A , vol.82 , pp. 4526-4530
    • Spady, D.K.1    Dietschy, J.M.2
  • 4
    • 0026575082 scopus 로고
    • Saturated and unsaturated fatty acids independently regulate low density lipoprotein receptor activity and production rate
    • Woollett LA, Spady DK, Dietschy JM. Saturated and unsaturated fatty acids independently regulate low density lipoprotein receptor activity and production rate. J Lipid Res 1992;33:77-88.
    • (1992) J Lipid Res , vol.33 , pp. 77-88
    • Woollett, L.A.1    Spady, D.K.2    Dietschy, J.M.3
  • 5
    • 0024372049 scopus 로고
    • Food consumption patterns in the 1960s in seven countries
    • Kromhout D, Keys A, Aravanis C, et al. Food consumption patterns in the 1960s in seven countries. Am J Clin Nutr 1989;49:889-94.
    • (1989) Am J Clin Nutr , vol.49 , pp. 889-894
    • Kromhout, D.1    Keys, A.2    Aravanis, C.3
  • 6
    • 0024514834 scopus 로고
    • On the within-population relationship between nutrition and serum lipids: The BIRNH Study
    • Kesteloot H, Geboers J, Joossens JV. On the within-population relationship between nutrition and serum lipids: the BIRNH Study. Eur Heart J 1989;10:196-202.
    • (1989) Eur Heart J , vol.10 , pp. 196-202
    • Kesteloot, H.1    Geboers, J.2    Joossens, J.V.3
  • 7
    • 0025360165 scopus 로고
    • Dietary and other determinants of lipoprotein levels within a population of Dutch males aged 28 and 29
    • Berns MAM, De Vries JHM, Katan MB. Dietary and other determinants of lipoprotein levels within a population of Dutch males aged 28 and 29. Eur J Clin Nutr 1990;44:535-44.
    • (1990) Eur J Clin Nutr , vol.44 , pp. 535-544
    • Berns, M.A.M.1    De Vries, J.H.M.2    Katan, M.B.3
  • 8
    • 0022982012 scopus 로고
    • The diet and 15-year death rate in the Seven Countries Study
    • Keys A, Menotti A, Karvonen MJ, et al. The diet and 15-year death rate in the Seven Countries Study. Am J Epidemiol 1986;124:903-15.
    • (1986) Am J Epidemiol , vol.124 , pp. 903-915
    • Keys, A.1    Menotti, A.2    Karvonen, M.J.3
  • 9
    • 0019079965 scopus 로고
    • The association of plasma high-density lipoprotein cholesterol with dietary intake and alcohol consumption
    • Ernst ND, Fisher M, Smith W, et al. The association of plasma high-density lipoprotein cholesterol with dietary intake and alcohol consumption. Circulation 1980;62(suppl IV):41-52.
    • (1980) Circulation , vol.62 , Issue.4 SUPPL. , pp. 41-52
    • Ernst, N.D.1    Fisher, M.2    Smith, W.3
  • 10
    • 0020784410 scopus 로고
    • Determinants of total and high density lipoprotein cholesterol in boys from Finland, the Netherlands, Italy, the Philippines and Ghana with special reference to diet
    • Knuiman JT, Westenbrink S, Van der Heijden L, et al. Determinants of total and high density lipoprotein cholesterol in boys from Finland, the Netherlands, Italy, The Philippines and Ghana with special reference to diet. Hum Nutr Clin Nutr 1983;37C:237-54.
    • (1983) Hum Nutr Clin Nutr , vol.37 C , pp. 237-254
    • Knuiman, J.T.1    Westenbrink, S.2    Van Der Heijden, L.3
  • 11
    • 0023483215 scopus 로고
    • Total cholesterol and high density lipoprotein cholesterol levels in populations differing in fat and carbohydrate intake
    • Knuiman JT, West CE, Katan MB, Hautvast JGAJ. Total cholesterol and high density lipoprotein cholesterol levels in populations differing in fat and carbohydrate intake. Arteriosclerosis 1987;7:612-9.
    • (1987) Arteriosclerosis , vol.7 , pp. 612-619
    • Knuiman, J.T.1    West, C.E.2    Katan, M.B.3    Hautvast, J.G.A.J.4
  • 12
    • 0023928990 scopus 로고
    • Dietary determinants of plasma lipids and lipoproteins: The Caerphilly Study
    • Fehily AM, Yarnell JWG, Bolton CH, Butland BK. Dietary determinants of plasma lipids and lipoproteins: the Caerphilly Study. Eur J Clin Nutr 1988;42:405-13.
    • (1988) Eur J Clin Nutr , vol.42 , pp. 405-413
    • Fehily, A.M.1    Yarnell, J.W.G.2    Bolton, C.H.3    Butland, B.K.4
  • 13
  • 14
    • 0025381744 scopus 로고
    • Boys from populations with high carbohydrate intake have higher fasting triglycerides than boys from populations with high fat intake
    • West CE, Sullivan DR, Katan MB, Halferkamps IL, Van der Torre HW. Boys from populations with high carbohydrate intake have higher fasting triglycerides than boys from populations with high fat intake. Am J Epidemiol 1990;131:271-82.
    • (1990) Am J Epidemiol , vol.131 , pp. 271-282
    • West, C.E.1    Sullivan, D.R.2    Katan, M.B.3    Halferkamps, I.L.4    Van Der Torre, H.W.5
  • 15
    • 0026492526 scopus 로고
    • Comparison on effects of lauric acid and palmitic acid on plasma lipids and lipoproteins
    • Denke MA, Grundy SM. Comparison on effects of lauric acid and palmitic acid on plasma lipids and lipoproteins. Am J Clin Nutr 1992;56:895-8.
    • (1992) Am J Clin Nutr , vol.56 , pp. 895-898
    • Denke, M.A.1    Grundy, S.M.2
  • 16
    • 0028179077 scopus 로고
    • Impact of myristic versus palmitic acid on serum lipid and lipoprotein levels in healthy women and men
    • Zock PL, De Vries JHM, Katan MB. Impact of myristic versus palmitic acid on serum lipid and lipoprotein levels in healthy women and men. Arterioscler Thromb 1994;14:567-75.
    • (1994) Arterioscler Thromb , vol.14 , pp. 567-575
    • Zock, P.L.1    De Vries, J.H.M.2    Katan, M.B.3
  • 17
    • 0021868631 scopus 로고
    • Comparison of effects of dietary saturated, monounsaturated, and polyunsaturated fatty acids on plasma lipids and lipoproteins in man
    • Mattson FH, Grundy SM. Comparison of effects of dietary saturated, monounsaturated, and polyunsaturated fatty acids on plasma lipids and lipoproteins in man. J Lipid Res 1985;26:194-202.
    • (1985) J Lipid Res , vol.26 , pp. 194-202
    • Mattson, F.H.1    Grundy, S.M.2
  • 18
    • 0023941578 scopus 로고
    • Effect of dietary stearic acid on plasma cholesterol and lipoprotein levels
    • Bonanome A, Grundy SM. Effect of dietary stearic acid on plasma cholesterol and lipoprotein levels. N Engl J Med 1988;318: 1244-8.
    • (1988) N Engl J Med , vol.318 , pp. 1244-1248
    • Bonanome, A.1    Grundy, S.M.2
  • 19
    • 0026596120 scopus 로고
    • Hydrogenation alternatives: Effects of trans fatty acids and stearic acid versus linoleic acid on serum lipids and lipoproteins in humans
    • Zock PL, Katan MB. Hydrogenation alternatives: effects of trans fatty acids and stearic acid versus linoleic acid on serum lipids and lipoproteins in humans. J Lipid Res 1992;33:399-410.
    • (1992) J Lipid Res , vol.33 , pp. 399-410
    • Zock, P.L.1    Katan, M.B.2
  • 20
    • 0025314240 scopus 로고
    • Effect of dietary trans fatty acids on high-density and low-density lipoprotein cholesterol in healthy subjects
    • Mensink RP, Katan MB. Effect of dietary trans fatty acids on high-density and low-density lipoprotein cholesterol in healthy subjects. N Engl J Med 1990;323:439-45.
    • (1990) N Engl J Med , vol.323 , pp. 439-445
    • Mensink, R.P.1    Katan, M.B.2
  • 21
  • 22
    • 0014868385 scopus 로고
    • Use of semisynthetic fats in determining effects of specific dietary fatty acids on serum lipids in man
    • McGandy RB, Hegsted DM, Myers ML. Use of semisynthetic fats in determining effects of specific dietary fatty acids on serum lipids in man. Am J Clin Nutr 1970;23:1288-98.
    • (1970) Am J Clin Nutr , vol.23 , pp. 1288-1298
    • McGandy, R.B.1    Hegsted, D.M.2    Myers, M.L.3
  • 23
    • 0040168103 scopus 로고
    • Dietary palmitate lowers cholesterol relative to laurate and myristate in humans
    • abstr
    • Sundram K, Hassan AH, Siru OH, Hayes KC. Dietary palmitate lowers cholesterol relative to laurate and myristate in humans. Arterioscler Thromb 1991;11:1614a(abstr).
    • (1991) Arterioscler Thromb , vol.11
    • Sundram, K.1    Hassan, A.H.2    Siru, O.H.3    Hayes, K.C.4
  • 24
    • 0025896749 scopus 로고
    • Nonhypercholesterolemic effects of a palm-oil diet in Malaysian volunteers
    • Ng TKW, Hassan K, Lim JB, Lye MS, Ishak R. Nonhypercholesterolemic effects of a palm-oil diet in Malaysian volunteers. Am J Clin Nutr 1991;53(suppl):1015-20.
    • (1991) Am J Clin Nutr , vol.53 , Issue.SUPPL. , pp. 1015-1020
    • Ng, T.K.W.1    Hassan, K.2    Lim, J.B.3    Lye, M.S.4    Ishak, R.5
  • 25
    • 0026710413 scopus 로고
    • Dietary palmitic and oleic exert similar effects on serum cholesterol and lipoprotein profiles in normocholesterolemic men and women
    • Ng TKW, Hayes KC, DeWitt GF, et al. Dietary palmitic and oleic exert similar effects on serum cholesterol and lipoprotein profiles in normocholesterolemic men and women. J Am Coll Nutr 1992;11: 383-90.
    • (1992) J Am Coll Nutr , vol.11 , pp. 383-390
    • Ng, T.K.W.1    Hayes, K.C.2    DeWitt, G.F.3
  • 26
    • 0025806838 scopus 로고
    • Dietary saturated fatty acids (12:0, 14:0, 16:0) differ in their impact on plasma cholesterol and lipoproteins in nonhuman primates
    • Hayes KC, Pronczuk A, Lindsey S, Diersen-Schade D. Dietary saturated fatty acids (12:0, 14:0, 16:0) differ in their impact on plasma cholesterol and lipoproteins in nonhuman primates. Am J Clin Nutr 1991;53:491-8.
    • (1991) Am J Clin Nutr , vol.53 , pp. 491-498
    • Hayes, K.C.1    Pronczuk, A.2    Lindsey, S.3    Diersen-Schade, D.4
  • 27
    • 0027446307 scopus 로고
    • The role of fatty acid saturation on plasma lipids, lipoproteins, and apolipoproteins: II. The plasma total and low-density lipoprotein cholesterol response of individual fatty acids
    • Derr J, Kris-Etherton PM, Pearson TA, Seligson FH. The role of fatty acid saturation on plasma lipids, lipoproteins, and apolipoproteins: II. The plasma total and low-density lipoprotein cholesterol response of individual fatty acids. Metabolism 1993;42:130-4.
    • (1993) Metabolism , vol.42 , pp. 130-134
    • Derr, J.1    Kris-Etherton, P.M.2    Pearson, T.A.3    Seligson, F.H.4
  • 28
    • 85046066418 scopus 로고
    • Effecten van laurinezuur en palmitinezuur op serumlipiden
    • in Dutch
    • Temme EHM, Mensink RD, Hornstra G. Effects of lauric and palmitic acid on serum lipids. (Effecten van laurinezuur en palmitinezuur op serumlipiden.) Voeding 1994;55:32(in Dutch).
    • (1994) Voeding , vol.55 , pp. 32
    • Temme, E.H.M.1    Mensink, R.D.2    Hornstra, G.3
  • 30
    • 50549194530 scopus 로고
    • Serum cholesterol response to changes in the diet. IV: Particular saturated fatty acids in the diet
    • Keys A, Anderson JT, Grande F. Serum cholesterol response to changes in the diet. IV: Particular saturated fatty acids in the diet. Metabolism 1965;14:776-87.
    • (1965) Metabolism , vol.14 , pp. 776-787
    • Keys, A.1    Anderson, J.T.2    Grande, F.3
  • 31
    • 0027397338 scopus 로고
    • The role of fatty acid saturation on plasma lipids, lipoproteins, and apolipoproteins: I. Effects of whole food diets high in cocoa butter, olive oil, soybean oil, dairy butter, and milk chocolate on the plasma lipids of young men
    • Kris-Etherton PM, Derr J, Mitchell DC, et al. The role of fatty acid saturation on plasma lipids, lipoproteins, and apolipoproteins: I. Effects of whole food diets high in cocoa butter, olive oil, soybean oil, dairy butter, and milk chocolate on the plasma lipids of young men. Metabolism 1993;42:121-9.
    • (1993) Metabolism , vol.42 , pp. 121-129
    • Kris-Etherton, P.M.1    Derr, J.2    Mitchell, D.C.3
  • 32
    • 0026697214 scopus 로고
    • Plasma lipoprotein lipid and Lp[a] changes with substitution of elaidic acid for oleic acid in the diet
    • Nestel PJ, Noakes M, Belling GB, et al. Plasma lipoprotein lipid and Lp[a] changes with substitution of elaidic acid for oleic acid in the diet. J Lipid Res 1992;33:1029-36.
    • (1992) J Lipid Res , vol.33 , pp. 1029-1036
    • Nestel, P.J.1    Noakes, M.2    Belling, G.B.3
  • 34
    • 0026665350 scopus 로고
    • Effect of dietary cis and trans fatty acids on serum lipoprotein[a] levels in humans
    • Mensink RP, Zock PL, Katan MB, Hornstra G. Effect of dietary cis and trans fatty acids on serum lipoprotein[a] levels in humans. J Lipid Res 1992;33:1493-501.
    • (1992) J Lipid Res , vol.33 , pp. 1493-1501
    • Mensink, R.P.1    Zock, P.L.2    Katan, M.B.3    Hornstra, G.4
  • 35
    • 0026969088 scopus 로고
    • Lipoprotein(a) in heart disease
    • Lawn RM. Lipoprotein(a) in heart disease. Sci Am 1992;266:26- 32.
    • (1992) Sci Am , vol.266 , pp. 26-32
    • Lawn, R.M.1
  • 36
    • 0022452424 scopus 로고
    • Paradoxical elevation of LDL apoprotein B levels in hypertriglyceridaemic patients and normal subjects ingesting fish oil
    • Sullivan DR, Sanders TAB, Trayner IM, Thompson GR. Paradoxical elevation of LDL apoprotein B levels in hypertriglyceridaemic patients and normal subjects ingesting fish oil. Atherosclerosis 1986;61: 129-34.
    • (1986) Atherosclerosis , vol.61 , pp. 129-134
    • Sullivan, D.R.1    Sanders, T.A.B.2    Trayner, I.M.3    Thompson, G.R.4
  • 37
    • 0347463278 scopus 로고
    • Omega-3 fatty acids in type IV hyperlipidemia: Fish oils vs methyl esters
    • abstr
    • Harris WS, Zucker ML, Dujovne CA. Omega-3 fatty acids in type IV hyperlipidemia: fish oils vs methyl esters. Am J Clin Nutr 1987;45: 858(abstr).
    • (1987) Am J Clin Nutr , vol.45 , pp. 858
    • Harris, W.S.1    Zucker, M.L.2    Dujovne, C.A.3
  • 38
    • 0023688185 scopus 로고
    • Effects of a low saturated fat, low cholesterol fish oil supplement in hypertriglyceridemic patients
    • Harris WS, Dujovne CA, Zucker ML, Johnson B. Effects of a low saturated fat, low cholesterol fish oil supplement in hypertriglyceridemic patients. Ann Intern Med 1988;109:465-70.
    • (1988) Ann Intern Med , vol.109 , pp. 465-470
    • Harris, W.S.1    Dujovne, C.A.2    Zucker, M.L.3    Johnson, B.4
  • 39
    • 0023917295 scopus 로고
    • Adverse metabolic effect of omega-3 fatty acids in non-insulin-dependent diabetes mellitus
    • Glauber H, Wallace P, Griver K, Brechtel G. Adverse metabolic effect of omega-3 fatty acids in non-insulin-dependent diabetes mellitus. Ann Intern Med 1988;108:663-8.
    • (1988) Ann Intern Med , vol.108 , pp. 663-668
    • Glauber, H.1    Wallace, P.2    Griver, K.3    Brechtel, G.4
  • 40
    • 0024368343 scopus 로고
    • Fish oil supplementation does not lower plasma cholesterol in men with hypercholesterolemia. Results of a randomized, placebo-controlled crossover study
    • Wilt TJ, Lofgren RP, Nichol KL, et al. Fish oil supplementation does not lower plasma cholesterol in men with hypercholesterolemia. Results of a randomized, placebo-controlled crossover study. Ann Intern Med 1989;111:900-5.
    • (1989) Ann Intern Med , vol.111 , pp. 900-905
    • Wilt, T.J.1    Lofgren, R.P.2    Nichol, K.L.3
  • 41
    • 0025834120 scopus 로고
    • Comparison of three species of dietary fish: Effects on serum concentrations of low-density-lipoprotein cholesterol and apolipoprotein in normotriglyceridemic subjects
    • Gerhard GT, Patton BD, Lindquist SA, Wander RC. Comparison of three species of dietary fish: effects on serum concentrations of low-density-lipoprotein cholesterol and apolipoprotein in normotriglyceridemic subjects. Am J Clin Nutr 1991;54:334-9.
    • (1991) Am J Clin Nutr , vol.54 , pp. 334-339
    • Gerhard, G.T.1    Patton, B.D.2    Lindquist, S.A.3    Wander, R.C.4
  • 42
    • 0021812276 scopus 로고
    • The inverse relation between fish consumption and 20-year mortality from coronary heart disease
    • Kromhout D, Bosschieter EB, De Lezenne Coulander C. The inverse relation between fish consumption and 20-year mortality from coronary heart disease. N Engl J Med 1985;312:1205-9.
    • (1985) N Engl J Med , vol.312 , pp. 1205-1209
    • Kromhout, D.1    Bosschieter, E.B.2    De Lezenne Coulander, C.3
  • 43
    • 0025900763 scopus 로고
    • Dietary fish oil lowers lipoprotein(a) in primary hypertriglyceridemia
    • Beil FU, Terres W, Orgass M, Greten H. Dietary fish oil lowers lipoprotein(a) in primary hypertriglyceridemia. Atherosclerosis 1991; 90:95-7.
    • (1991) Atherosclerosis , vol.90 , pp. 95-97
    • Beil, F.U.1    Terres, W.2    Orgass, M.3    Greten, H.4
  • 44
    • 85046068181 scopus 로고
    • Consumptie van vet, vetzuren en cholesterol naar voedingsmiddelengroep en naar sociale klasse in de voedselconsumptiepeiling 1987-1988
    • in Dutch
    • Hospers JJ, Katan MB, Van Oosten-van der Goes GJC, Van Staveren WA. Intake of fat, fatty acids and cholesterol from different food groups and different social-economic classes in the Dutch Nutrition Survey of 1987-1988. (Consumptie van vet, vetzuren en cholesterol naar voedingsmiddelengroep en naar sociale klasse in de voedselconsumptiepeiling 1987-1988.) Voeding 1992;53: 9-14(in Dutch).
    • (1992) Voeding , vol.53 , pp. 9-14
    • Hospers, J.J.1    Katan, M.B.2    Van Oosten-van Der Goes, G.J.C.3    Van Staveren, W.A.4
  • 46
    • 0003206485 scopus 로고
    • Composition of foods: Fats and oils
    • Washington, DC: US Government Printing Office
    • US Department of Agriculture. Composition of foods: fats and oils. Agriculture handbook no. 8-4. Washington, DC: US Government Printing Office, 1990.
    • (1990) Agriculture Handbook , vol.8 , Issue.4
  • 47
    • 0027153371 scopus 로고
    • Cholesterol lowering and mortality: The importance of considering initial level of risk
    • Davey Smith G, Song F, Sheldon TA. Cholesterol lowering and mortality: the importance of considering initial level of risk. Br Med J 1993;306:1367-73.
    • (1993) Br Med J , vol.306 , pp. 1367-1373
    • Davey Smith, G.1    Song, F.2    Sheldon, T.A.3
  • 48
    • 0019080053 scopus 로고
    • High-density lipoprotein cholesterol levels. The Lipid Research Clinics Program Prevalence Study
    • Heiss G, Johnson NJ, Reiland S, Davis CE, Tyroler HA. High-density lipoprotein cholesterol levels. The Lipid Research Clinics Program Prevalence Study. Circulation 1980;62(suppl IV):116-36.
    • (1980) Circulation , vol.62 , Issue.4 SUPPL. , pp. 116-136
    • Heiss, G.1    Johnson, N.J.2    Reiland, S.3    Davis, C.E.4    Tyroler, H.A.5
  • 49
    • 0024501678 scopus 로고
    • High-density lipoprotein cholesterol and cardiovascular disease
    • Gordon DJ, Probstfield JL, Garrison RJ, et al. High-density lipoprotein cholesterol and cardiovascular disease. Circulation 1989;79: 8-15.
    • (1989) Circulation , vol.79 , pp. 8-15
    • Gordon, D.J.1    Probstfield, J.L.2    Garrison, R.J.3
  • 50
    • 0023232216 scopus 로고
    • Helsinki heart study: Primary-prevention trial with gemfibrozil in middle-aged men with dyslipidemia. Safety of treatment, changes in risk-factors, and incidence of coronary heart disease
    • Frick MH, Elo O, Haapa K, et al. Helsinki heart study: primary-prevention trial with gemfibrozil in middle-aged men with dyslipidemia. Safety of treatment, changes in risk-factors, and incidence of coronary heart disease. N Engl J Med 1987;317:1237-45.
    • (1987) N Engl J Med , vol.317 , pp. 1237-1245
    • Frick, M.H.1    Elo, O.2    Haapa, K.3


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