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*CDC, 2000, MMWR-MORBID MORTAL W, V49, P714
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*CDC, 2000, MMWR-MORBID MORTAL W, V49, P820
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*CDC, 2000, MMWR-MORBID MORTAL W, V49, P178
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*CDC, 2000, NATL W NILE SURV SYS
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*CDC, 2001, MMWR-MORBID MORTAL W, V50, P37
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*CDC, 2000, MMWR-MORBID MORTAL W, V49, P25
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Centers for Disease Control and Prevention (CDC), 1999, MMWR Morb Mortal Wkly Rep, V48, P845
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Centers for Disease Control and Prevention (CDC), 2000, MMWR Morb Mortal Wkly Rep, V49, P1044