Navaratnam V, Millett ER, Hurst JR, Thomas SL, Smeeth L, Hubbard RB, Brown J, Quint JK.


Link to publication page: http://thorax.bmj.com/content/72/2/161

Journal Ref: Thorax. 2017 Feb;72(2):161-166. doi: 10.1136/thoraxjnl-2015-208188.