[Recruitment difficulties for clinical trials in primary care. When sample size is not reached].

Atencion primaria / Sociedad Espanola de Medicina de Familia y Comunitaria

PubMedID: 23142032

Llor C, Moragas A. [Recruitment difficulties for clinical trials in primary care. When sample size is not reached]. Aten Primaria. 2013;45(2):71-3.
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