My husband, age 64, was diagnosed with Parkinson's one year ago. His father died of ALS almost 20 years ago at the age of 69 (he passed away 9 months after diagnosis). I know that my husband was experiencing many symptoms before he would go to the doctor, not the least of which was his left foot dragging. He didn't want to get a diagnosis of ALS which can have a similar first symptom. Has any correlation between the two diseases ever been made? His children and family would like to know.