Carsin AE, Fuertes E, Schaffner E, Jarvis D, Anto JM, Heinrich J, Bellisario V, Svanes C, Keidel D, Imboden M, Weyler J, Nowak D, Martinez-Moratalla J, Gullon JA, Sanchez Ramos JL, Caviezel S, Beckmeyer-Borowko A, Raherison C, Pin I, Demoly P, Cerveri I, Accordini S, Gislason T, Toren K, Forsberg B, Janson C, Jogi R, Emtner M, Gomez Real F, Raza W, Leynaert B, Pascual S, Guerra S, Dharmage SC, Probst-Hensch N, Garcia-Aymerich J. Restrictive spirometry pattern is associated with low physical activity levels. A population based international study. Respir Med. 2019 Jan;146:116-23. doi: 10.1016/j.rmed.2018.11.017