Letter to the Editor
Features of Spanish non-commercial non-pharmacological completed clinical trials conducted in primary care
Características de los ensayos clínicos españoles no comerciales y no farmacológicos completados, realizados en atención primaria
a Biostatistics and Epidemiology Unit, Health Research Institute-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid, Madrid, Spain
b Technical Secretariat, Research Ethics Committee (CEIm), La Paz University Hospital, Health Research Institute La Paz University Hospital, IdiPAZ, Madrid, Spain
