Authors: Eric G Campbell; Joel S Weissman; Susan Ehringhaus; Sowmya R Rao; Beverly Moy; Sandra Feibelmann; Susan Dorr Goold Journal: JAMA Date: 2007-10-17 Impact factor: 56.272
Authors: Erick H Turner; Annette M Matthews; Eftihia Linardatos; Robert A Tell; Robert Rosenthal Journal: N Engl J Med Date: 2008-01-17 Impact factor: 91.245