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Swigris, Jeffrey J., Frederick S. Wamboldt, Juergen Behr, Roland M du Bois, Talmadge E. King, Ganesh Raghu, and Kevin K. Brown. The Six-minute Walk in Idiopathic Pulmonary Fibrosis: Longitudinal Changes and Minimum Important Difference. 2009.

Swigris, Jeffrey J., et al. The Six-minute Walk in Idiopathic Pulmonary Fibrosis: Longitudinal Changes and Minimum Important Difference. 2009.