RT Journal Article SR Electronic T1 Re: Exposure to asbestos and the risk of colorectal cancer mortality: a systematic review and meta-analysis by Kwak et al JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 655 OP 655 DO 10.1136/oemed-2020-106588 VO 77 IS 9 A1 Paolo Boffetta YR 2020 UL http://oem.bmj.com/content/77/9/655.abstract AB