Singh D, Bafadhel M, Brightling CE, Sciurba FC, Curtis JL, Martinez FJ, Pasquale CB, Merrill DD, Metzdorf N, Petruzzelli S, Tal-Singer R, Compton C, Rennard S, Martin UJ. Blood Eosinophil Counts in Clinical Trials for Chronic Obstructive Pulmonary Disease. Am J Respir Crit Care Med. 2020 09 01; 202(5):660-671.