Assertion: pericardial valve | /r/HasProperty | distributed around the world
Facets:
value: between 1987
type: TEMPORAL
value: between 1976
type: TEMPORAL
Source sentences:
text: Approximately 200,000 pericardial valves manufactured by Shiley Laboratories were distributed around the world between 1976 and 1987 and it is presumed that most of them were implanted in patients.