Impact of 4.0% chlorhexidine cleansing of the umbilical cord on mortality and omphalitis among newborns of Sylhet, Bangladesh: design of a community-based cluster randomized trial oleh Ahmed Saifuddin, Darmstadt Gary L, Rahman Mohammad R, Rahman Syed M, Mannan Ishtiaq, Shah Rasheduzzaman, Winch Peter J, El Arifeen Shams, Mullany Luke C, Santosham Mathuram, Black Robert E, Baqui Abdullah H