title: Primum non nocere.
authors.forename: David
authors.initials: D
authors.lastname: Sturdee
authors.forename: Alastair
authors.initials: A
authors.lastname: MacLennan
mesh_terms: D000368:Aged; D015986:Confounding Factors, Epidemiologic; D003327:Coronary Disease / Q000517:prevention & control*; D015914:Estrogen Replacement Therapy / Q000009:adverse effects*; D026690:Ethics, Clinical; D005260:Female; D006801:Humans; D018579:Patient Selection; D016032:Randomized Controlled Trials as Topic / Q000941:ethics* / Q000592:standards*; D015203:Reproducibility of Results