Shift Work Disorder in a Random Population Sample - Prevalence and Comorbidities Di Milia, Lee ; Waage, Siri ; Pallesen, Ståle ; Bjorvatn, Bjørn Abstract Publication: PLoS ONE Pub Date: January 2013 DOI: 10.1371/journal.pone.0055306 Bibcode: 2013PLoSO...855306D