title: Credible control groups and blinding.
authors.affiliation: Department of Anaesthesiology, The University of Hong Kong, Hong Kong, HKSAR.
authors.forename: S W
authors.initials: SW
authors.lastname: Choi
authors.affiliation: Department of Anaesthesiology, Queen Mary Hospital, Hong Kong, HKSAR.
authors.forename: D M H
authors.initials: DM
authors.lastname: Lam
mesh_terms: D015670:Acupuncture Therapy; D035061:Control Groups; D004311:Double-Blind Method; D006801:Humans; D012107:Research Design