RT Journal Article SR Electronic T1 Pirfenidone for IPF: pro/con debate; the ‘con’ viewpoint JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 605 OP 608 DO 10.1136/thoraxjnl-2011-201269 VO 68 IS 7 A1 Ganesh Raghu A1 David R Thickett YR 2013 UL http://thorax.bmj.com/content/68/7/605.abstract AB