Authors: Meredith B Rosenthal; Ernst R Berndt; Julie M Donohue; Richard G Frank; Arnold M Epstein Journal: N Engl J Med Date: 2002-02-14 Impact factor: 91.245
Authors: Sebastian Schneeweiss; Stephen B Soumerai; Robert J Glynn; Malcolm Maclure; Colin Dormuth; Alexander M Walker Journal: CMAJ Date: 2002-03-19 Impact factor: 8.262
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