Institute of Medicine (U.S.). Committee on the U.S. Physician Supply ; Detmer, Don E. ; Institute of Medicine Staff ; Kathleen N. Lohr, Neal A. Vanselow, and Don E. Detmer ; Lohr, Kathleen N. ; Vanselow, Neal Arthur ; Committee on the U.S. Physician Supply ; National Academy of Sciences ; Vanselow, Neal A.