Effect of city-wide sanitation programme on reduction in rate of childhood diarrhoea in northeast Brazil: assessment by two cohort studies by Barreto, Mauricio L, Prof, Genser, Bernd, PhD, Strina, Agostino, MD, Assis, Ana Marlucia O, Prof, Rego, Rita F, MD, Teles, Carlos A, MSc, Prado, Matildes S, MSc, Matos, Sheila MA, MSc, Santos, Darci N, PhD, dos Santos, Lenaldo A, BSc, Cairncross, Sandy, Prof, Teixeira, Maria Gloria

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