Bloem, A., Veltkamp, M., Spruit, M. A., Custers, J. W., Bakker, E. W., Dolk, H. M., & Grutters, J. C. (2018). Validation of 4-meter-gait-speed test and 5-repetitions-sit-to-stand test in patients with pulmonary fibrosis: a clinimetric validation study. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, 35(4), 317-326. https://doi.org/10.36141/svdld.v35i4.7035