Yogindra Samant1, Axel Wannag2, Pavel Urban2, Stefano Mattioli2. 1. Norwegian Labour Inspection Authority, Statens Hus, Trondheim 7468, Norway Norwegian Labour Inspection Authority (Retired), Statens Hus, Trondheim 7468, Norway Department of Occupational Medicine, Charles University, Ovocny 3-4, 116 36 Prague 1, Czech Republic Department of Medical and Surgical Sciences, Academic Discipline: MED/44 Occupational Medicine, Dipartimento di Scienze Mediche e Chirurgiche Via Massarenti 9, Bologna, Italy yogindra.samant@arbeidstilsynet.no a.wannag@getmail.no pavel.urban@szu.cz s.mattioli@unibo.it. 2. Norwegian Labour Inspection Authority, Statens Hus, Trondheim 7468, Norway Norwegian Labour Inspection Authority (Retired), Statens Hus, Trondheim 7468, Norway Department of Occupational Medicine, Charles University, Ovocny 3-4, 116 36 Prague 1, Czech Republic Department of Medical and Surgical Sciences, Academic Discipline: MED/44 Occupational Medicine, Dipartimento di Scienze Mediche e Chirurgiche Via Massarenti 9, Bologna, Italy.