disease shares features of familial periodic paralysis Huntington disease Westphal disease https://github.com/monarch-initiative/mondo/issues/6008 Westphal variant of Huntington's disease GTR:AN0099344 GTR:AN0099345 Westphal disease GTR:AN0099343 MONDO:0042980 UMLS:C1279186 GARD:0005557 HD- Westphal variant MEDGEN:224821 SCTID:182747006 MESH:C536694