Additional file 2.

Treatment types reported in the included studies. This list includes all the treatments mentioned in any study. Often a treatment may have been listed in the Methods of a study but no details were provided about dose or duration or age of treatment or frequency of treatment or separate connection to a specific outcome result, for example. It was possible to group treatment types by large category (pharmacological, non-pharmacological, or MMT) and pool the reported outcomes in these categories.

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Shaw et al. BMC Medicine 2012 10:99   doi:10.1186/1741-7015-10-99