RT Journal Article SR Electronic T1 Defamatory article by Martin Walker JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 136 OP 136 DO 10.1136/oem.58.2.136 VO 58 IS 2 A1 DOLL, SIR RICHARD YR 2001 UL http://oem.bmj.com/content/58/2/136.1.abstract AB