The value of blood cytokines and chemokines in assessing COPD oleh Eric Bradford, Sean Jacobson, Jason Varasteh, Alejandro P. Comellas, Prescott Woodruff, Wanda O’Neal, Dawn L. DeMeo, Xingnan Li, Victor Kim, Michael Cho, Peter J. Castaldi, Craig Hersh, Edwin K. Silverman, James D. Crapo, Katerina Kechris, Russell P. Bowler