<http://ns.inria.fr/covid19/PMC7358998#title>	<http://purl.org/dc/terms/subject>	"Lung" .
<http://ns.inria.fr/covid19/PMC7358998#title>	<http://purl.org/dc/terms/subject>	"Causal inference" .
<http://ns.inria.fr/covid19/PMC7358998#title>	<http://purl.org/dc/terms/subject>	"Human anatomy by organ" .