[1] Friedrich Alexander Univ Erlangen Nuernberg, Erlangen, Germany
[2] Paracelsus Med Univ, Gen Hosp Nuremburg Dept Psychosomat Med & Psychot, Salzburg, Austria
[3] Ulm Univ Hosp, Anesthesiol Pathophysiol & Proc Engn, Ulm, Germany
[4] Friedrich Alexander Univ Erlangen Nurnberg, Chair Hlth Psychol, Erlangen, Germany