Belo, J., Palmeiro, T., Caires, I., Papoila, A. L., Alves, M., Carreiro-Martins, P., Botelho, M. A., & Neuparth, N. (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