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Flowchart schematically showing inclusion and exclusion of papers. Those marked with a * were excluded either because they were referred to at places in the text that did not discuss duration of tuberculosis, tuberculosis mortality, case fatality, life tables or natural history, or because the title indicated that the paper was not about one of these topics; ** for two of these, data were included to the extent mentioned by Berg [115] (see legend of Table 3).
