1. Tecnologico de Monterrey, Escuela de Medicina Y Ciencias de la Salud, Monterrey, Mexico.
2. Internal Medicine Department, SSNL-Hospital Metropolitano “Dr. Bernardo Sepúlveda,” Monterrey, Mexico.
3. Palliative Care Unit, Sant Pau Hospital, Autonomous University of Barcelona, Barcelona, Spain.
4. Department of Palliative Care and Rehabilitation and Integrative Medicine, MD Anderson Cancer Center, Houston, Texas.