Observational studies and randomized trials of hormone replacement therapy: what can we learn from them?
Whittemore
Alice S
AS
Department of Health Research and Policy, Stanford University School of Medicine, CA 94305, USA. alicesw@stanford.edu
McGuire
Valerie
V
D015340:Epidemiologic Research Design; D015914:Estrogen Replacement Therapy / Q000009:adverse effects; D005260:Female; D006801:Humans; D019370:Observation; D016032:Randomized Controlled Trials as Topic; D014481:United States; D016387:Women's Health