Engagement of private health care facilities in TB management in Lusaka district of Zambia: lessons learned and achievements oleh Robert Hambwalula, Mary Kagujje, Innocent Mwaba, Dennis Musonda, David Singini, Lilungwe Mutti, Nsala Sanjase, Paul C. Kaumba, Luunga M. Ziko, Kevin M. Zimba, Pauline Kasese-Chanda, Monde Muyoyeta