Assertion: als's disease | /r/HasProperty | familial als
Facets:
Source sentences:
text: There is no known definitive cause of ALS, but a hereditary form of the disease, familial ALS, occurs in 5%–10% of cases (1).
text: In the remaining 5 to 10 percent of cases, the disease is called familial ALS because it is passed down through families.