title: Changing procedures.
authors: S R
authors: SR
authors: Porter
authors: J
authors: J
authors: Bell
authors: G
authors: G
authors: Ridgway
authors: C
authors: C
authors: Scully
mesh_terms: D017742:Dental Care for Chronically Ill; D003797:Dental Staff; D006801:Humans; D016273:Occupational Exposure; D017096:Prion Diseases / Q000097:blood* / Q000635:transmission*; D006113:United Kingdom