Assertion: hemifacial spasm | /r/CreatedBy | a blood vessel
Facets:
value: most often
type: DEGREE
Source sentences:
text: Hemifacial spasm is most often caused by a blood vessel touching a facial nerve, but it may be caused by a facial nerve injury or a tumor, or it may not have a cause.
text: Hemifacial spasm is most often caused by a blood vessel touching a facial nerve.