John Strang, Wayne Hall, Matt Hickman, Sheila M Bird
Strang J, Hall W, Hickman M, Bird S M.
Impact of supervision of methadone consumption on deaths related to methadone overdose (1993-2008): analyses using OD4 index in England and Scotland
BMJ 2010; 341 :c4851
doi:10.1136/bmj.c4851