hey starrnr, there are many articles regarding this exact same topic and problem. It is believed that if you ha a parent who suffered who suffered with this disorder have a higer risk of passing it one down to their children. Please if you feeling any problems or have suspections that there mah somesthin wrong then you shoul go get ti checked out ASA:. Here here is z kin i flound. Kee; us up to date.
http://www.health.gov.mt/impaedcard/issue/issue6/pdf/1837.pdf