[1] MEMORIAL SLOAN KETTERING CANC CTR,NEW YORK,NY 10021
[2] NEW YORK STATE DEPT HLTH,DIV LABS & RES,ALBANY,NY 12201
[3] UNIV TEXAS,SW MED SCH,DEPT MICROBIOL,DALLAS,TX 75235
[4] WAYNE STATE UNIV,SCH MED,DEPT IMMUNOL & MICROBIOL,DETROIT,MI 48202
[5] WILLIAM BEAUMONT HOSP,RES INST,DEPT IMMUNOCHEM,ROYAL OAK,MI 48072