1. Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands
2. LVR-Klinik Bedburg-Hau, Kleve, Germany
3. Division of Acupuncture and Meridian, WHO Collaborating Centre for Traditional Medicine, East–West Medical Research Institute and School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
4. TALK, Free University of Brussels, Brussels, Belgium