Measuring tuberculosis patient perceived quality of care in public and public–private mix settings in India: an instrument development and validation study oleh Karikalan Nagarajan, Beena E Thomas, Ramya Ananthakrishnan, Basilea Watson, Sudha Rani, Jagadeesan Murugesan, Murugesan Periyasamy, Deepalakshmi A, Vignesh Kumar J, Stephen A, Lavanya Jayabal, Tiju Thomas, Sumathi G N