1. Center for Natural and Cultural History of Man; Danube Private University; Krems Austria
2. Department of Quality Management and Accreditation; Leuphana University; Lüneburg Germany
3. Clinic for Reconstructive Dentistry and Temporomandibular Disorders; University Center of Dental Medicine Basel; School of Dental Medicine; Basel Switzerland
4. Institute of Tropical Medicine; Eberhard Karls University Tübingen; Tübingen Germany
5. Vietnamese-German Center for Medical Research; Hanoi Vietnam