1. Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee,
2. Division of Nursing Research, St. Jude children's Research Hospital, Memphis, Tennessee
3. Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee
4. Division of Behavioral Medicine; St Jude children's Research Hospital, Memphis, Tennessee
5. St. Vincent Children's Center for Cancer and Blood Diseases, Indianapolis, Indiana