1. Department of Biomedical Sciences for Health, Università degli Studi di Milano, via G. Colombo, 71, 20133 – Milano (Italy)
2. Department of Dental Care and Public Health, Faculty of Public Health, Hedmark University College, Hamarveien, 112, 2411 – Elverum (Norway)
3. Department of Sports, UiT Arctic University of Norway, Follumsvei 31, N-9509 – Alta (Norway)