CORD-19:35349bb1fc9290338907b7d7f104c9db3951163b / 2450-2457 JSONTXT

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    CORD-PICO

    {"project":"CORD-PICO","denotations":[{"id":"p1_all22","span":{"begin":0,"end":7},"obj":"Intervention"},{"id":"p2_i10","span":{"begin":0,"end":7},"obj":"Control"}],"text":"placebo"}