Karnath Bernard M, Thornton William, Das Carlo Mandira
Department of Internal Medicine, Division of General Medicine, University of Texas Medical Branch, 301 University Boulevard, Rt 0566, Galveston, Texas 77555-0566, USA.
Med Educ. 2003 Nov;37(11):1048-9. doi: 10.1046/j.1365-2923.2003.01643.x.