1. Department of Palliative Care, King Hussein Cancer Center, Amman 11941, Jordan
2. Center for Palliative & Cancer Care in Conflict, King Hussein Cancer Center, Amman 11941, Jordan
3. Faculty of Medicine, The University of Jordan, Amman 11941, Jordan
4. Faculty of Nursing, Al al-Bayt University, Mafraq 25113, Jordan
5. College of Nursing, Sultan Qaboos University, Muscat 123, Oman
6. Department of Medicine, King Hussein Cancer Center, Amman 11941, Jordan
7. Office of Nursing, King Hussein Cancer Center, Amman 11941, Jordan
8. MD Anderson Cancer Center, Houston, TX 77030, USA