RT Journal Article SR Electronic T1 Mortality in relation to smoking: the British Doctors Study JF Breathe JO Breathe FD European Respiratory Society SP 275 OP 276 DO 10.1183/20734735.013416 VO 12 IS 3 A1 Maria Elisa Di Cicco A1 Vincenzo Ragazzo A1 Tiago Jacinto YR 2016 UL http://breathe.ersjournals.com/content/12/3/275.abstract AB