title: Reply from the authors.
authors.forename: Stephen C
authors.initials: SC
authors.lastname: Mathai
authors.forename: Robert A
authors.initials: RA
authors.lastname: Wise
authors.forename: Milo A
authors.initials: MA
authors.lastname: Puhan
authors.forename: Diana
authors.initials: D
authors.lastname: Lam
mesh_terms: D003627:Data Interpretation, Statistical; D005080:Exercise Test / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000503:physiopathology*; D008297:Male; D017063:Outcome Assessment, Health Care / Q000379:methods*