Epidemiology on trial.
Barton
Anthony
A
D015982:Bias; D003277:Contraceptives, Oral, Combined / Q000009:adverse effects*; D006801:Humans; D007603:Jurisprudence; D013923:Thromboembolism / Q000139:chemically induced*; D006113:United Kingdom; D020246:Venous Thrombosis / Q000139:chemically induced*
D003277:Contraceptives, Oral, Combined