Immunogenicity and protective efficacy of tuberculosis subunit vaccines expressing PPE44 (Rv2770c)., Romano, Marta, Rindi Laura, Korf Hannelie, Bonanni Daniela, Adnet Pierre-Yves, Jurion Fabienne, Garzelli Carlo, and Huygen Kris , Vaccine, 2008 Nov 11, Volume 26, Issue 48, p.6053-63, (2008)