RT Journal Article SR Electronic T1 Human trafficking for forced labour and occupational health JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 807 OP 808 DO 10.1136/oemed-2014-102452 VO 71 IS 12 A1 Cathy Zimmerman A1 Marc B Schenker YR 2014 UL http://oem.bmj.com/content/71/12/807.abstract AB