title: Filters and Ayre's T-piece.
authors.forename: J M
authors.initials: JM
authors.lastname: Goddard
authors.forename: H R
authors.initials: HR
authors.lastname: Bennett
mesh_terms: D000776:Anesthesiology / Q000295:instrumentation*; D003428:Cross Infection / Q000517:prevention & control; D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation*; D006801:Humans