RT Journal Article SR Electronic T1 Weight-based reference equations for the 6-min walk test can be misleading in obese patients JF ERJ Open Research JO erjor FD European Respiratory Society SP 00028-2020 DO 10.1183/23120541.00028-2020 VO 6 IS 2 A1 Jeffrey M. Haynes A1 Gregg L. Ruppel A1 David A. Kaminsky YR 2020 UL http://openres.ersjournals.com/content/6/2/00028-2020.abstract AB