TY - JOUR T1 - Early, but not late chronotypes, are up during their biological night when working the night shift JF - Occupational and Environmental Medicine JO - Occup Environ Med SP - 235 LP - 235 DO - 10.1136/oemed-2014-102572 VL - 72 IS - 3 AU - Céline Vetter AU - Eva S Schernhammer Y1 - 2015/03/01 UR - http://oem.bmj.com/content/72/3/235.1.abstract N2 - Bhatti et al 1 recently examined the impact of chronotype on melatonin levels in shift-workers and concluded that ‘(…) morning type shift-workers were better able to maintain normal patterns of melatonin secretion (…), suggesting that morning types may be protected against the negative effects of shift-work related melatonin disruption’. However, their data show that, compared to daytime workers sleeping at night, early chronotypes have lower melatonin … ER -