Costs And Getting Ethical Approval Deter Doctors From Participating In Multicentre Trials
Autor: | Crooks, S. W., Colman, S. B., Campbell, I. A. |
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Zdroj: | BMJ: British Medical Journal, 1996 Jun . 312(7047), 1669-1669. |
Databáze: | JSTOR Journals |
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