RT Journal Article SR Electronic T1 On the importance of quantification JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 609 OP 609 DO 10.1136/oemed-2012-101072 VO 69 IS 9 A1 Dana Loomis YR 2012 UL http://oem.bmj.com/content/69/9/609.abstract AB