Learning how to control biases in studies to identify adverse effects of drugs.
Vessey
Martin
M
Unit of Health Care Epidemiology, Oxford University, Rosemary Rue Building, Old Road Campus, Oxford OX3 7LF, UK. martin.vessey@dphpc.ox.ac.uk
D015982:Bias; D016022:Case-Control Studies; D003271:Contraceptive Agents, Female / Q000009:adverse effects*; D005260:Female; D020249:Hormone Replacement Therapy / Q000009:adverse effects*; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D013923:Thromboembolism / Q000139:chemically induced*
D003271:Contraceptive Agents, Female