Authors: John P A Ioannidis; Tahmeed Ahmed; Shally Awasthi; A Mark Clarfield; Jocalyn Clark; Lalit Dandona; Amanda Howe; Juan M Lozano; Youping Li; Hardi Madani; Ana Marusic; Idris Mohammed; Gretchen P Purcell; Margaret Rhoads; Karen Sliwa-Hähnle; Sharon E Straus; Tessa Tan-Torres Edejer; Peter Tugwell; Robyn Ward; Michael S Wilkes; Richard Smith Journal: BMJ Date: 2007-01-27