1. Department of Oral and Maxillofacial Diseases University of Helsinki and Helsinki University Hospital Helsinki Finland
2. Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam Amsterdam The Netherlands
3. Finnish Institute of Occupational Health Helsinki Finland
4. Institute for Molecular Medicine Finland FIMM HiLIFE, University of Helsinki Helsinki Finland
5. UKK Institute for Health Promotion Research Tampere Finland