Throughout his career memberships and functions in more than 22 national and international societies in the field of neuropsychopharmacology, biological psychiatry and neurology (e.g. President of the Austrian Sleep Research Association=ASRA, President of the International Pharmaco-EEG Group=IPEG, Chair of the Section of Sleep Research in Psychiatry, Austrian Society of Psychiatry and Psychotherapy=ÖGPP, Secretary of the Collegium Internationale Neuro-Psychopharma-cologicum=C.I.N.P., Vice President of the AGNP, etc.)