McKelvie R S, Benedict C R, Yusuf S
Department of Medicine, Division of Cardiology, McMaster University, Hamilton Health Sciences Corporation-General Division, 237 Barton Street East, Hamilton, ON, Canada L8L 2X2.
BMJ. 1999 May 22;318(7195):1400-2. doi: 10.1136/bmj.318.7195.1400.