RT Journal Article SR Electronic T1 Evolution in surgical approach and techniques for lung cancer JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 681 OP 681 DO 10.1136/thoraxjnl-2012-203157 VO 68 IS 7 A1 Calvin S H Ng A1 Kelvin K W Lau A1 Diego Gonzalez-Rivas A1 Gaetano Rocco YR 2013 UL http://thorax.bmj.com/content/68/7/681.abstract AB