Observational versus randomised trial evidence.
Wiseman
Martin
M
D001205:Ascorbic Acid / Q000008:administration & dosage; D015984:Causality; D003327:Coronary Disease / Q000209:etiology / Q000517:prevention & control; D019317:Evidence-Based Medicine; D006801:Humans; D019370:Observation; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome
D001205:Ascorbic Acid