- Correspondence to Professor Irina Guseva Canu, Institut universitaire romand de la Santé au Travail (IST), Route de la Corniche, 2 CH-1066 Epalinges-Lausanne, Suisse;
- Received August 25, 2017
- Revised November 1, 2017
- Accepted November 3, 2017
- First published December 4, 2017.
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