Authors: Greg A Knoll; Atul Humar; Dean Fergusson; Olwyn Johnston; Andrew A House; S Joseph Kim; Tim Ramsay; Michaël Chassé; Xiaoli Pang; Jeff Zaltzman; Sandra Cockfield; Marcelo Cantarovich; Martin Karpinski; Louise Lebel; John S Gill Journal: JAMA Date: 2014-11-26 Impact factor: 56.272