Enhanced disease surveillance through private health care sector cooperation in Karachi, Pakistan: experience from a vaccine trial

Khan MI, Sahito SM, Khan MJ, Wassan SM, Shaikh AW, Maheshwari AK, Acosta CJ, Galindo CM, Ochiai RL, Rasool S, Peerwani S, Puri MK, Ali M, Zafar A, Hassan R, von Seidlein L, Clemens JD, Nizami SQ, Bhutta ZA. Enhanced disease surveillance through private health care sector cooperation in Karachi, Pakistan: experience from a vaccine trial. Bull World Health Organ. 2006; 84(1): 72-7.