_:b57969492	<http://www.w3.org/ns/oa#hasSelector>	_:b57969493 .
_:b57969493	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57969493	<http://www.w3.org/ns/oa#exact>	"serum ferritin" .
_:b57969492	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/4a883a2d60aa1b52f423ee62fe3fbdf19a7b91f0/0> .