RT Journal Article SR Electronic T1 Organic dusts and respiratory cancer: a complex issue JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 717 OP 717 DO 10.1136/oem.2006.028316 VO 63 IS 11 A1 L Rushton YR 2006 UL http://oem.bmj.com/content/63/11/717.abstract AB