1. Department of Anesthesiology and Reanimation, Sancaktepe Martyr Prof. Dr. Ilhan Varank Education and Research Hospital, Istanbul, Turkey.
2. Department of Palliative Care, Rehabilitation, and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
3. Research Medical Library, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.