title: Reply: minimal or maximal clinically important difference: using death to define MCID.
authors.forename: Michael I
authors.initials: MI
authors.lastname: Polkey
authors.forename: Martijn A
authors.initials: MA
authors.lastname: Spruit
authors.forename: Emiel
authors.initials: E
authors.lastname: Wouters
authors.forename: Lisa D
authors.initials: LD
authors.lastname: Edwards
authors.forename: Ruth
authors.initials: R
authors.lastname: Tal-Singer
authors.forename: Bartolome
authors.initials: B
authors.lastname: Celli
mesh_terms: D005080:Exercise Test / Q000379:methods* / Q000706:statistics & numerical data*; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000401:mortality* / Q000503:physiopathology*