Sputum-to-serum hydrogen sulfide ratio in COPD
Junpei Saito, Alex J Mackay, Christos Rossios, David Gibeon, Patricia Macedo, Rudy Sinharay, Pankaj K Bhavsar, Jadwiga A Wedzicha, Kian Fan Chung
Thorax Oct 2014, 69 (10) 903-909; DOI: 10.1136/thoraxjnl-2013-204868