1. Real Decreto 561/1993, de 16 de Abril,1993
2. Recent experience of ethics committee review of a multicentre research project;Ashford, J.J.;British Journal of Clinical Pharmacology,1987
3. Diversity in the practice of district ethics committees;Gilbert, C.; Fulford, K.W.M.; Parker, C.;British Medical Journal,1989
4. Monitoring research ethics committees;Lock, S.,1990
5. Current experience of central versus local ethics approval in multicentre studies;Watling, M.I.L.; Dewhurst, J.K.;Journal of the Royal College of Physicians of London,1993