1 “.... The U.S. Department of Veterans Affairs (VA) was shown to offer a good model of a sustained program. Key...”

2 “.... The U.S. Department of Veterans Affairs (VA) was shown to offer a good model of a sustained program. Key...”

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4

5 “... the effectiveness of isoniazid for preventing active TB was published more than 40 years ago and was conducted among...”

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7

8 “... specification and ascertainment and the lack of fair- or good-quality trials that assess the impact...”

9 “... specification and ascertainment and the lack of fair- or good-quality trials that assess the impact...”