Kinney GL, Santorico SA, Young KA, Cho MH, Castaldi PJ, San Jos? Est?par R, Ross JC, Dy JG, Make BJ, Regan EA, Lynch DA, Everett DC, Lutz SM, Silverman EK, Washko GR, Crapo JD, Hokanson JE. Identification of Chronic Obstructive Pulmonary Disease Axes That Predict All-Cause Mortality: The COPDGene Study. Am J Epidemiol. 2018 10 01; 187(10):2109-2116.