Authors: Andreas E. Stuck, Laurence Z. Rubenstein, Darryl Wieland, Jan P. Vandenbroucke, Les Irwig, Petra Macaskill, Geoffrey Berry, Paul Glasziou, Valerie Seagroatt, Irene Stratton, Matthias Egger, George Davey Smith, C Minder, Peter Langhorne, Feng Song, Simon Gilbody - BMJ 1998 cited by 694
