Enhanced disease surveillance through private health care sector cooperation in Karachi, Pakistan: experience from a vaccine trial.
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A. K. Maheshwari | Z. Bhutta | C. Acosta | S. Rasool | J. Clemens | Mohammad Ali | L. von Seidlein | R. L. Ochiai | A. Zafar | Mahesh K. Puri | C. Galindo | S. Nizami | S. Sahito | S. M. Wassan | M. I. Khan | A. Shaikh | M. Khan | Sheeraz Peerwani | Rumina Hassan | Mohammad Javed Khan