The authors respond

Epidemiology

Volumn 23, Issue 2, 2012, Pages 351-352

  Lipsitch, Marc ^a   Tchetgen Tchetgen, Eric ^a   Cohen, Ted ^a,b  

^a HARVARD SCHOOL OF PUBLIC HEALTH   (United States)

^b BRIGHAM AND WOMEN S HOSPITAL   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BODY MASS; HUMAN; LETTER; LOW BIRTH WEIGHT; MATERNAL SMOKING; OBESITY; PASSIVE SMOKING; PATERNAL SMOKING; PERINATAL PERIOD; PREGNANCY; PRIORITY JOURNAL; PROGENY;

EID: 84856894760     PISSN: 10443983     EISSN: 15315487     Source Type: Journal    
DOI: 10.1097/EDE.0b013e3182460c23     Document Type: Letter

References (2)

1. Davey Smith G. Negative exposure controls in epidemiologic studiesletter. Epidemiology. 2011;23:351-352.
2. Lipsitch M, Tchetgen Tchetgen E, Cohen T. Negative controls: A tool for detecting confounding and bias in observational studies. Epidemiology. 2010;21:383-388.