title: Letters to the editor.
authors.affiliation: UCL Respiratory, University College London, London, UK.
authors.forename: Lewis
authors.initials: L
authors.lastname: Buss
authors.affiliation: UCL Respiratory, University College London, London, UK.
authors.forename: John R
authors.initials: JR
authors.lastname: Hurst
mesh_terms: D001794:Blood Pressure / Q000502:physiology*; D006801:Humans; D011634:Public Health; D012907:Smoking / Q000009:adverse effects*