Operational research within a Global Fund supported tuberculosis project in India: why, how and its contribution towards change in policy and practice oleh Karuna D Sagili, Srinath Satyanarayana, Sarabjit S Chadha, Nevin C Wilson, Ajay M V Kumar, Patrick K Moonan, John E Oeltmann, Vineet K Chadha, Sharath Burugina Nagaraja, Smita Ghosh, Terrence Q Lo, Tyson Volkmann, Matthew Willis, Kalpita Shringarpure, Ravichandra Chinnappa Reddy, Prahlad Kumar, Sreenivas A Nair, Raghuram Rao, Mohammed Yassin, Perry Mwangala, Rony Zachariah, Jamhoih Tonsing, Anthony D Harries, Sunil Khaparde