Belo, Joana, Teresa Palmeiro, Iolanda Caires, Ana L. Papoila, Marta Alves, Pedro Carreiro-Martins, Maria A. Botelho, and Nuno Neuparth. 2019. “Reference Values for Spirometry in Elderly Individuals: A Cross-Sectional Study of Different Reference Equations”. Multidisciplinary Respiratory Medicine 13 (1). https://doi.org/10.4081/mrm.2018.71.