Test-retest reliability, construct validity and determinants of 6-minute walk test performance in adult patients with asthma von Meys, R., Janssen, S.M.J., Franssen, F.M.E., Vaes, A.W., Stoffels, A.A.F., van Hees, H.W.H., van den Borst, B., Klijn, P.H., Burtin, C., van 't Hul, A.J., Spruit, M.A.

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