“Plasma pro-surfactant protein B and lung function decline in smokers.” Janice M. Leung, John Mayo, Wan Tan, C. Martin Tammemagi, Geoffrey Liu, Stuart Peacock, Frances A. Shepherd, John Goffin, Glenwood Goss, Garth Nicholas, Alain Tremblay, Michael Johnston, Simon Martel, Francis Laberge, Rick Bhatia, Heidi Roberts, Paul Burrowes, Daria Manos, Lori Stewart, Jean M. Seely, Michel Gingras, Sergio Pasian, Ming-Sound Tsao, Stephen Lam and Don D. Sin, for the Pan-Canadian Early Lung Cancer Study Group. Eur Respir J 2015; 45: 1037–1045.