Comparing recruitment strategies in a study of acupuncture for chronic back pain
Karen J Sherman, Rene J Hawkes, Laura Ichikawa, Daniel C Cherkin, Richard A Deyo, Andrew L Avins, Partap S KhalsaТом:
9
Мова:
english
DOI:
10.1186/1471-2288-9-69
Date:
December, 2009
Файл:
PDF, 490 KB
english, 2009