ALLEGHENY GENERAL HOSPITAL; BIRMINGHAM VETERANS HOSPITAL; COUNTY HOSPITAL SAN FRANCISCO; HINES VETERANS HOSPITAL; HOSPITAL OF THE UNIV OF PA; JEFFERSON MEDICAL COLLEGE; LONG ISLAND JEWISH HILLSIDE MEDICAL CENT; LOYOLA UNIV HOSPITAL; MANHATTAN VETERANS HOSPITAL; MEMORIAL HOSPITAL; MOFFITT HOSPITAL; NCI, NATL CANCER INST; PITTSBURGH VETERANS HOSPITAL; ST LUKES HOSPITAL SAN FRANCISCO; THOMAS JEFFERSON UNIV HOSPITAL; UNIV OF AL HOSPITAL; UNIV OF CA SAN FRANCISCO; UNIV OF PITTSBURGH EYE + EAR HOSPITAL