Faulty analysis or unsuitable data?
Bird
S M
SM
D015982:Bias; D003627:Data Interpretation, Statistical; D006079:Government Publications as Topic; D006801:Humans; D010506:Periodicals as Topic; D015819:Substance Abuse, Intravenous / Q000401:mortality; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000401:mortality; D006113:United Kingdom / Q000453:epidemiology