Assertion: ether's history | /r/HasProperty | necessary
Facets:
Source sentences:
text: Careful medical history is necessary because CDAD has been reported to occur more than 2 months after the administration of antibacterial agents.
text: Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.
text: Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents.