Costs and getting ethical approval deter doctors from participating in multicentre trials.
Crooks
S W
SW
Colman
S B
SB
Campbell
I A
IA
D002986:Clinical Trials as Topic; D003365:Costs and Cost Analysis; D026724:Ethical Review; D028744:Ethics Committees, Research; D004992:Ethics, Medical; D006801:Humans; D015337:Multicenter Studies as Topic; D018579:Patient Selection; D035842:Research Subjects; D006113:United Kingdom