Multi-ethnic reference values for spirometry for the 3–95-yr age range: the global lung function 2012 equations
Philip H. Quanjer, Sanja Stanojevic, Tim J. Cole, Xaver Baur, Graham L. Hall, Bruce H. Culver, Paul L. Enright, John L. Hankinson, Mary S.M. Ip, Jinping Zheng, Janet Stocks, the ERS Global Lung Function Initiative
European Respiratory Journal Dec 2012, 40 (6) 1324-1343; DOI: 10.1183/09031936.00080312