[1] Comenius Univ, Fac Law, Dept Labor Law & Social Welf Law, Bratislava 81000, Slovakia
[2] Univ Groningen, Univ Med Ctr Groningen, Dept Commun & Occupat Med, NL-9713 AV Groningen, Netherlands
[3] PJ Safarik Univ Kosice, Fac Med, Grad Sch Kosice Inst Soc & Hlth, Kosice 04001, Slovakia
[4] Palacky Univ, Olomouc Univ, Theol Fac, Social Hlth Inst, Olomouc 77111, Czech Republic