1. Institute for Management and Economics in Health Care, UMIT—University of Health Sciences, Medical Informatics and Technology, 6060 Hall in Tirol, Austria
2. Waldhausklinik, Acute Hospital for Internal Medicine, Pain Therapy, Complementary and Individualized Patient Centred Medicine, 86391 Deuringen, Germany
3. University Seeburg Castle, 5201 Seekirchen am Wallersee, Austria