Authors: John H Kempen; Ebenezer Daniel; James P Dunn; C Stephen Foster; Sapna Gangaputra; Asaf Hanish; Kathy J Helzlsouer; Douglas A Jabs; R Oktay Kaçmaz; Grace A Levy-Clarke; Teresa L Liesegang; Craig W Newcomb; Robert B Nussenblatt; Siddharth S Pujari; James T Rosenbaum; Eric B Suhler; Jennifer E Thorne Journal: BMJ Date: 2009-07-03