1. First Propaedeutic Department of Internal Medicine, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Foundation for Acupuncture and Biological Treatment Methods, Sabbatsbergs Hospital, Stockholm, Sweden
3. British Medical Acupuncture Society, Royal London Hospital for Integrated Medicine, University College London Hospitals NHS Foundation Trust, London, UK
4. Anaesthesiology and ICU Department, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece