Susan M Levin1, Neal D Barnard2, Rose E Saltalamacchia3. 1. Physicians Committee for Responsible Medicine, Washington, District of Columbia. Electronic address: slevin@pcrm.org. 2. Physicians Committee for Responsible Medicine, Washington, District of Columbia; Department of Medicine, George Washington University, Washington, District of Columbia. 3. Physicians Committee for Responsible Medicine, Washington, District of Columbia.