1. Hematology, Oncology and Radiology Services, St. Jude Children’s Research Hospital, Memphis, Tenn.
2. St. Jude Children's Research hospital; Instructor in Pediatrics, University of Tennessee, Memphis, Tenn.
3. St. Jude Children's Research Hospital; Assistant Professor of Pediatrics, University of Tennessee, Memphis, Tenn.
4. St. Jude Children's Research hospital; Associate Professor of Radiology, University of Tennessee, Memphis, Tenn.
5. St. Jude Children's Research hospital; Associate Professor of Pediatrics, University of Tennessee, Memphis, Tenn.
6. Laboratories of Virology and immunology, St. Jude Children's Research Hospital; Assistant Professor, Departments of Microbiology and Pediatrics, University of Tennessee, Memphis, Tenn.
7. St. Jude Children's Research Hospital; Professor of Pediatrics, University of Tennessee, Memphis, Tenn.