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APA Citation
Bloem, A. E., Veltkamp, M., Custers, J. W., Dolk, H. M., Grutters, J. C., & Spruit, M. (2017). within-day test–retest reliability of the 6-min walk test in patients with pulmonary fibrosis. European respiratory journal, 49(2), . http://access.bl.uk/ark:/81055/vdc_100172022236.0x000111