[1] ABIM Fdn, Philadelphia, PA 19106 USA
[2] Brigham & Womens Hosp, Boston, MA USA
[3] Assoc Amer Med Coll, Washington, DC USA
[4] Amer Board Internal Med, Philadelphia, PA USA
[5] Univ Calif Berkeley, Berkeley, CA 94720 USA
[6] So Cardiopulm Associates, La Grange, GA USA
[7] Robert Wood Johnson Fdn, Princeton, NJ 08540 USA
[8] Amer Soc Internal Med, Amer Coll Phys, Philadelphia, PA USA