TY - JOUR A1 - Doll, R. A1 - Peto, R. A1 - Wheatley, K. A1 - Gray, R. A1 - Sutherland, I. T1 - Mortality in relation to smoking: 40 years’ observations on male British doctors Y1 - 1994 DO - 10.1136/bmj.309.6959.901 UR - https://doi.org/10.1136/bmj.309.6959.901 VL - 309 IS - 6959 ER -