1. Department of Anaesthesiology, Critical Care Medicine, Pain Therapy and Palliative Care, Benedictus Hospital Tutzing, Tutzing, Germany;
2. Department of Anaesthesiology, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany;
3. Sports medicine private practice, Bogota, Colombia;
4. Pharmacology Unit, Department of Biomedical Sciences, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia;
5. Center For Research in Genetics and Genomics (CIGGUR), GENIUROS Research Group, School of Medicine and Health Sciences, Universidad del Rosario, Bogota, Colombia;
6. Pain Clinic, Hospital Santo Tomas, Panama City, Panama;
7. Neurology Department, Medical Faculty of Syiah Kuala University/Dr Zainoel Abidin Hospital (RSUZA), Banda Aceh, Indonesia;
8. Department of Orthopaedics, Universidad Nacional de Trujillo, Trujillo, Peru;
9. Clinica Neurologia y Neurofisiologica Integral, Guatemala City, Guatemala;
10. Pain Management Service, Raffles Hospital, Singapore;
11. Department of Pain and Palliative Care, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico;
12. Hong Kong Pain Medicine Centre, Central, Hong Kong;
13. Department of Geriatrics, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico;
14. Department of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Thailand;
15. Department of Anesthesiology, Asian Hospital and Medical Center, Muntinlupa City, Philippines;
16. Department of Anesthesiology, The Medical City, Pasig City, Philippines;
17. Pain Center, Department of Neurology, Hospital das Clinicas FMUSP, São Paulo, Brazil