[1] Goethe Univ, Univ Hosp Frankfurt, Occupat Hlth Serv, D-60590 Frankfurt, Germany
[2] Univ New S Wales, UNSW Med, Sch Publ Hlth & Community Med, Sydney, NSW 2052, Australia
[3] Hellen Ctr Dis Control & Prevent, Dept Intervent Hlth Care Facil, Athens 15123, Greece