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c Step ccccccccccc 3.5 2.5 1.5 0.5 ccccccc 52% …c Step ccccccccccc 3.5 2.5 1.5 0.5 ccccccc 52% 31% Lancet, 2002) cccccccccccccccccccccc cc c cc cc 40 30 18% o 1998) cc c 15P&-FA

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Page 1: c Step ccccccccccc 3.5 2.5 1.5 0.5 ccccccc 52% …c Step ccccccccccc 3.5 2.5 1.5 0.5 ccccccc 52% 31% Lancet, 2002) cccccccccccccccccccccc cc c cc cc 40 30 18% o 1998) cc c 15P&-FA