Causes of death through verbal autopsy: findings from a sub-study of single dose oral cholera vaccination in urban Dhaka, Bangladesh oleh Md. Taufiqul Islam, Md. Mazharul I. Zion, Md. Arifuzzaman Khan, Zahid H. Khan, Faisal Ahmmed, Shamim Ahmed, Azimuddin Ahmed, Afroza Akter, Fahima Chowdhury, Amit Saha, Nirod C. Saha, Deok R. Kim, Jean-Louis Excler, Julia Lynch, John D. Clemens, Firdausi Qadri, Ashraful I. Khan