Jean-François Chenot1
, Annette Becker1,2
, Corinna Leonhardt3
, Stefan Keller3,4
, Norbert Donner-Banzhoff2
, Erika Baum2
, Michael Pfingsten5
, Jan Hildebrandt5
, Heinz-Dieter Basler3
and Michael M Kochen1 
1
Dpt. of General Practice, University of Göttingen, Humboldtallee 38, 37073 Göttingen, Germany
2
Dpt. of General Practice, Preventive and Rehabilitation Medicine, University of Marburg, Robert-Koch-Str. 5, 35033 Marburg, Germany
3
Institute for Medical Psychology, University of Marburg, Bunsenstr. 3, 35037 Marburg, Germany
4
Dpt. of Public Health Sciences, University of Hawaii at Manoa, 1960 East-West Rd., Honolulu, HI 96822, USA
5
Dpt. of Anaesthesiology, Pain Clinic, University of Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany