title: Response to letter to the editor.
authors.affiliation: CRY Dept. of Cardiovascular Pathology, Cardiovascular Sciences Research Centre, Level 1, Jenner Wing, St. George's University of London, Cranmer Terrace, London, SW17 0RE UK msheppar@sgul.ac.uk.
authors.forename: Mary N
authors.initials: MN
authors.lastname: Sheppard
mesh_terms: D001237:Asphyxia / Q000209:etiology* / Q000401:mortality*; D005260:Female; D006801:Humans; D012149:Restraint, Physical / Q000009:adverse effects*; D019966:Substance-Related Disorders / Q000150:complications*