Campbell M, Fitzpatrick R, Haines A, Kinmonth A L, Sandercock P, Spiegelhalter D, Tyrer P
Office of the President, Medical Research Council of Canada, 1600 Scott Street, Ottawa, Ontario, Canada K1 OW9.
BMJ. 2000 Sep 16;321(7262):694-6. doi: 10.1136/bmj.321.7262.694.