- Correspondence to Dr Alessandro Marinaccio, Epidemiology Unit, Occupational and Environmental Medicine, Epidemiology and Hygiene Department, Italian National Workers Compensation Authority (INAIL), Rome 00143, Italy;
- Received September 28, 2016
- Revised September 4, 2017
- Accepted October 5, 2017
- First published December 21, 2017.
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