PT - JOURNAL ARTICLE AU - Wegman, David H TI - Challenges for occupational epidemiology in the 21st century: observations and opportunities AID - 10.1136/oemed-2014-102487 DP - 2014 Nov 01 TA - Occupational and Environmental Medicine PG - 739--741 VI - 71 IP - 11 4099 - http://oem.bmj.com/content/71/11/739.short 4100 - http://oem.bmj.com/content/71/11/739.full SO - Occup Environ Med2014 Nov 01; 71