Authors: Sebastian Schneeweiss; Alexander M Walker; Robert J Glynn; Malcolm Maclure; Colin Dormuth; Stephen B Soumerai Journal: N Engl J Med Date: 2002-03-14 Impact factor: 91.245
Authors: Muhammad Mamdani; Paula A Rochon; David N Juurlink; Alex Kopp; Geoffrey M Anderson; Gary Naglie; Peter C Austin; Andreas Laupacis Journal: BMJ Date: 2002-09-21