RT Journal Article SR Electronic T1 Occupational activity across adult life and its association with grip strength JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 425 OP 426 DO 10.1136/oemed-2016-103626 VO 73 IS 7 A1 Rachel Cooper YR 2016 UL http://oem.bmj.com/content/73/7/425.abstract AB