1. College of Health Sciences, School of Pharmacy, Addis Ababa University, Addis Ababa, Ethiopia
2. College of Health Sciences, Tikur Anbesa Specialized Hospital, Oncology Unit, Addis Ababa University, Addis Ababa, Ethiopia
3. Treat the Pain Division, American Cancer Society, Addis Ababa, Ethiopia
4. Hematology/Oncology/General Pediatrics, Duke University Hospital, Durham, NC, USA
5. University of North Carolina Medical Center, Chapel Hill, NC, USA
6. Division of Pharmacotherapy and Experimental Therapeutics, University of North Carolina Eshelman School of Pharmacy, Chapel Hill, NC, USA
7. University of North Carolina Lineberger Comprehensive Cancer Center, Chapel Hill, NC, USA