PMC:7551987 / 4709-4835 JSONTXT

{"project":"2_test","denotations":[{"id":"32971954-15501473-143921944","span":{"begin":1,"end":3},"obj":"15501473"},{"id":"32971954-18062992-143921945","span":{"begin":7,"end":9},"obj":"18062992"}],"text":",17,18,19]. One critical component of these studies revolves around whether virulence evolves independently of free-living sur"}