Methodological reasons for not gaining prior informed consent are sometimes justified.
Dawson
Angus J
AJ
Centre for Professional Ethics, Keele University, Staffordshire ST5 5BG. a.j.dawson@keele.ac.uk
D006801:Humans; D007258:Informed Consent / Q000941:ethics*; D016032:Randomized Controlled Trials as Topic / Q000941:ethics* / Q000379:methods