CORD-19:22616110b79baaf4c9d23f130a9ee35c64d991f7 / 578-596
Annnotations
CORD-PICO
{"project":"CORD-PICO","denotations":[{"id":"p1_all3","span":{"begin":0,"end":18},"obj":"Intervention"},{"id":"p2_i1","span":{"begin":0,"end":18},"obj":"Control"}],"text":"placebo-controlled"}