Martinez CH, Li SX, Hirzel AJ, Stolberg VR, Alexis NE, Barr RG, Bleecker ER, Carretta EE, Christenson SA, Cooper CB, Couper DJ, Doerschuk CM, Han MK, Hansel NN, Hastie AT, Hoffman EA, Kaner RJ, Martinez FJ, Meyers DA, O'Neal WK, Paine R, Putcha N, Rennard SI, Woodruff PG, Zeidler M, Curtis JL, Freeman CM. Alveolar eosinophilia in current smokers with chronic obstructive pulmonary disease in the SPIROMICS cohort. J Allergy Clin Immunol. 2018 01; 141(1):429-432.