1 Donders Center for Cognition, Radboud University Nijmegen, 6525 HR Nijmegen, The Netherlands.
2 Psychiatric Research Institute, LVR-Klinik Bedburg-Hau, 47551 Bedburg-Hau, Germany.
3 Division of Acupuncture & Meridian, WHO Collaborating Center for Traditional Medicine, East-West Medical Research Institute and School of Korean Medicine, Kyung Hee University, Seoul 130-701, Korea.
4 Karel de Grote Hoge School, 2018 Antwerp, Belgium.
5 Department of Acupuncture & Meridian of Oriental Medicine, Sang Ji University, Wonju 26339, Korea.
6 Brussels Institute for Applied Linguistics, Free University of Brussels, 1050 Brussels, Belgium.