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Times when treatment was to be given and mortality monitored, and range of ages (1·0–6·0 years) and dates (May, 1999–April, 2004) for inclusion in main analyses of child mortality
Shaded area indicates more than 2 years’ treatment already received. Diagonal lines describe involvement of children born on May 1 in 1995, 1998, and 2001. With 1 million children of age 1·0–6·0 years at any one time, 5 million child-years at risk are included.
