PT - JOURNAL ARTICLE AU - Gerhard B Holt TI - Time of day of cognitive tests might distort shift work study results AID - 10.1136/oemed-2014-102693 DP - 2015 May 01 TA - Occupational and Environmental Medicine PG - 381--382 VI - 72 IP - 5 4099 - http://oem.bmj.com/content/72/5/381.1.short 4100 - http://oem.bmj.com/content/72/5/381.1.full SO - Occup Environ Med2015 May 01; 72