Bero L A, Grilli R, Grimshaw J M, Harvey E, Oxman A D, Thomson M A
Institute for Health Policy Studies, University of California at San Francisco, 1388 Sutter Street, 11th floor, San Francisco, CA 94109, USA.
BMJ. 1998 Aug 15;317(7156):465-8. doi: 10.1136/bmj.317.7156.465.