1. Oncología Medica, Centro Médico Nacional 20 de Noviembre, Mexico City, Mexico
2. School of Pharmacy and Allied Health Professions, St. John's University, 8000 Utopia Parkway Queens, NY 11439, USA
3. Hospital General de México, Mexico City, Mexico
4. Outcomes Research and Pricing Support, Merck & Co., Inc., One Merck Drive, P.O. Box 100, Whitehouse Station, NJ 08889‐0100, USA
5. Oncología Privada, Hospital Regional C/MF No. 1, Cuernavaca, Mexico