1. Faculty of Medicine and Life Sciences; University of Tampere; Tampere Finland
2. Department of Dermatology; Tampere University Hospital; Tampere Finland
3. Epilaser Oy; Lempäälä Finland
4. Optoelectronics Research Centre; Tampere University of Technology (TUT); Korkeakoulunkatu 3 33720 Tampere Finland
5. Unit of Primary Health Care; Helsinki University Central Hospital; Helsinki Finland
6. Department of General Practice; University of Helsinki; Helsinki Finland
7. Unit of Primary Health Care; Kuopio University Hospital; Kuopio Finland
8. The French National Institute of Health and Medical Research (INSERM); INSERM U1189-ONCO-THAI; avenue Oscar Lambert 1 59037 Lille Cedex France