PT - JOURNAL ARTICLE AU - Fred Gerr AU - Nate Fethke TI - Ascertaining computer use in studies of musculoskeletal outcomes among computer workers: differences between self-report and computer registration software AID - 10.1136/oemed-2011-100116 DP - 2011 Jul 01 TA - Occupational and Environmental Medicine PG - 465--466 VI - 68 IP - 7 4099 - http://oem.bmj.com/content/68/7/465.short 4100 - http://oem.bmj.com/content/68/7/465.full SO - Occup Environ Med2011 Jul 01; 68