rcigarette smoking and lung cancer among British physicians (45-49 years).7SD719 Mar 2007 10:47smokesceperyrs1cases01 %9.0g%9.0g%9.0g%9.0fc%9.0g%9.0gcigarettes per day2 number of person-years at risk number of lung cancer casessk ff@333Aff~AQ33A 33A 33#B,