PT - JOURNAL ARTICLE AU - R J Kocken AU - J A Knottnerus AU - P E Smeets TI - GPs as participants in scientific research. DP - 1993 Jul 01 TA - British Journal of General Practice PG - 305--306 VI - 43 IP - 372 4099 - http://bjgp.org/content/43/372/305.2.short 4100 - http://bjgp.org/content/43/372/305.2.full SO - Br J Gen Pract1993 Jul 01; 43