1. School of Nursing, University of North Carolina, North Carolina, USA
2. Ramathibodi School of Nursing, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
3. School of Nursing, Duke University, North Carolina, USA
4. Department of Physiology, North Carolina State University, Raleigh, North Carolina, USA
5. Department of Hematology, Duke University School of Medicine, Durham, North Carolina, USA