[1] Massachusetts Gen Hosp, Ctr Ambulatory Care, Boston, MA 02114 USA
[2] Accreditat Council Grad Med Educ, Chicago, IL USA
[3] Univ Texas, Med Branch, Galveston, TX 77550 USA
[4] Univ Iowa, Sch Med, Iowa City, IA 52242 USA
[5] Thomas Jefferson Univ, Sch Med, Philadelphia, PA 19107 USA
[6] Amer Coll Physicians, Amer Board Internal Med, Philadelphia, PA USA
[7] Univ Pittsburgh, Med Ctr, Pittsburgh, PA USA
[8] Harvard Univ, Sch Med, Boston, MA USA