RT Journal Article SR Electronic T1 Supporting the urban poor to quit tobacco: adding years to lives JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 105 OP 106 DO 10.1136/thoraxjnl-2016-209435 VO 72 IS 2 A1 Kamran Siddiqi A1 Helen Elsey YR 2017 UL http://thorax.bmj.com/content/72/2/105.abstract AB