Cloning of the gene encoding a 22-kilodalton cell surface antigen of Mycobacterium bovis BCG and analysis of its potential for DNA vaccination against tuberculosis., Lefèvre, P, Denis O, De Wit L, Tanghe A, Vandenbussche P, Content J, and Huygen K , Infect Immun, 2000 Mar, Volume 68, Issue 3, Number 1047, p.1040-7, (2000)