1. Hematology, Pediatrics and Pathology Services, St. Jude Children’s Research Hospital, Memphis, Tenn., and the Departments of Pediatrics and Pathology, The University of Tennessee Medical Units, Memphis, Tenn.
2. St. Jude Children's Research Hospital, Memphis, Tenn., and Assistant Professor of Pediatrics, University of Tennessee Medical Units, Memphis, Tenn. Elizabeth Holland, M.D.: Trainee in Pediatrics, St. Jude Children's Research Hospital, Memphis, Tenn.
3. St. Jude Children's Research Hospital, Memphis, Tenn.
4. St. Jude Children's Research Hospital, Memphis, Tenn. University of Tennessee Medical Units, Memphis, Tenn.