... withthe worrying level of sunbed use among adolescents in some countries, indicate the need for pre-ventive action in Europe.Measurements are necessary to determine UVR at ground level. The measurement-based ... may result in discrepancy between the numerator (the number of acci-dents) and the denominator (the number of employees) of the incidence rate. The limited num-ber of countries covered in the ... more comparable and informative two methods may be employed. Either onlyregular workers, excluding self-employed people, trainees and others, should be considered in theincidence rates. Alternatively,...