Search strategies used for searching electronic databases.

*‘tuberculosis’ (either as Mesh heading or as free text) and ‘untreated’ and one of the other terms (as Mesh term or as free text) were searched for.**‘tuberculosis’ (either as Mesh heading or as free text) and one of the other terms (as Mesh term or as free text) were searched for.†‘tuberculosis’ either as subject heading or as free text in title and ‘course’ as free text in title or abstract or one of the other terms as subject heading or as free text in title.‡Occuring as duplicate either within search, with searches in other electronic databases, or with snowball sample.