RT Journal T1 The evolving relationship between the physician and the scientist in the 20th centuryaddressing the needs of basic and clinical research: Analysis of graduates of the university of pennsylvania md-phd programbridging the worlds of medicine and science: an interview with bert i. shapiro, mdannouncement1999 john conley ethics essay contest for medical students JF JAMA JO JAMA YR 1999 FD January 6 VO 281 IS 1 SP 95 OP 96 DO 10.1001/jama.281.1.95 UL http://dx.doi.org/10.1001/jama.281.1.95 AB