title: Reply.
authors.affiliation: Royal Brompton and Harefield NHS Foundation Trust, London, UK.
authors.forename: G A
authors.initials: GA
authors.lastname: Margaritopoulos
authors.affiliation: University Hospital of Heraklion, Crete, Greece.
authors.forename: K M
authors.initials: KM
authors.lastname: Antoniou
authors.affiliation: University College London Medical School, Royal Free Hospital, London, UK.
authors.forename: C P
authors.initials: CP
authors.lastname: Denton
authors.affiliation: Royal Brompton and Harefield NHS Foundation Trust, London, UK.
authors.forename: A U
authors.initials: AU
authors.lastname: Wells
mesh_terms: D006801:Humans; D006976:Hypertension, Pulmonary; D012129:Respiratory Function Tests; D012595:Scleroderma, Systemic