Behavioral abnormalities including difficulties with social interactions, poor communication skills, hyperactivity, stubbornness, and/or repetitive behaviors are common.
[rarediseases.org]
communication skills, autistic features and polyphagia.
[nature.com]
Behavioral disorders were frequently reported (18/32) and consisted of a wide range of problems, including hyperactivity, stubbornness, aggressiveness, frustration, intolerance, poor
[nature.com]