PDD NOS UPDATE

My sister's six year old son received a diagnosis of PDD NOS (Pervasive Developmental Disorder, Not Otherwise Specified). I am now wondering if PDD NOS runs in my family. My parents are from the Azores and my husband parents are from the main land. Upon researching the internet today, I came across a couple of links that I found interesting.

http://www.modernmedicine.com/modernmedicine/Modern+Medicine+Now/iMETi-Gene-Variant-Linked-to-Autism-GI-Disorders/ArticleNewsFeed/Article/detail/584471
http://homepage.ntlworld.com/clifford.g.miller/Mitochondrial.html
http://www.igc.gulbenkian.pt/research/unit/29
http://www.ncbi.nlm.nih.gov/pubmed/17880640
http://www3.interscience.wiley.com/journal/118482306/abstract
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WDT-4T3TPYB-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=0de74efe6f4415e53e7f536c37e9d124
http://www.blisstree.com/autismvox/the-subpopulation-of-mitochondrial-autism/
http://www.medicinenet.com/mitochondrial_disease/article.htm