Li X, Ortega VE, Ampleford EJ, Graham Barr R, Christenson SA, Cooper CB, Couper D, Dransfield MT, Han MLK, Hansel NN, Hoffman EA, Kanner RE, Kleerup EC, Martinez FJ, Paine R, Woodruff PG, Hawkins GA, Bleecker ER, Meyers DA. Genome-wide association study of lung function and clinical implication in heavy smokers. BMC Med Genet. 2018 08 01; 19(1):134.