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. 2018 Oct 24;13(10):e0205321. doi: 10.1371/journal.pone.0205321

Fig 2. USG values across five different industries in four different European countries.

Fig 2

Symbols connected with lines represents participants at the ONSET and END of a work shift. Black diamonds [♦]: Police officers, both inside the office and outdoors, uniform is required. Black dot [●]: Agriculture workers, working outside with no protective clothing requirements. Black crucifix [+]: Tourism workers, inside the office and outdoors. Black square [■]: Construction workers, required to wear protective clothing. Black cross [X]: Aluminum extrusion workers, required to wear protective clothing.