Complex sentence: Progressive bulbar palsy patients that have this mutation are classified with FALS patients, Familial ALS (FALS) accounts for about 5% -10% of all ALS cases and is caused by genetic factors.
Split into simpler sentences: Progressive bulbar palsy patients that have this mutation are classified with FALS patients, Familial ALS. FALS accounts for about 5% -10% of all ALS cases and is caused by genetic factors.