Cabrera, S.G., Medina, J.C., Salaberryborda, A.M., Librán, M.J., González, H.M. and Savio, E. 2007. Difficulty in diagnosing tuberculosis in patients infected by the human immunodeficiency virus (HIV) and variables that determine the initiation of an empirical anti-tuberculosis treatment. Revista Médica del Uruguay. 23, 3 (Sep. 2007), 164-172.