PT - JOURNAL ARTICLE AU - CĂ©line Vetter AU - Eva S Schernhammer TI - Early, but not late chronotypes, are up during their biological night when working the night shift AID - 10.1136/oemed-2014-102572 DP - 2015 Mar 01 TA - Occupational and Environmental Medicine PG - 235--235 VI - 72 IP - 3 4099 - http://oem.bmj.com/content/72/3/235.1.short 4100 - http://oem.bmj.com/content/72/3/235.1.full SO - Occup Environ Med2015 Mar 01; 72