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http://huntingtonsdisease.weebly.com/
http://www.medicinenet.com/huntington_disease/page4.htm
http://sct.screening.nhs.uk/whatisacarrier
http://www.nlm.nih.gov/medlineplus/ency/article/000770.htm
http://learn.genetics.utah.edu/content/disorders/singlegene/hunt/
http://www.mayoclinic.org/diseases-conditions/huntingtons-disease/basics/symptoms/con-20030685
http://www.mayoclinic.org/diseases-conditions/huntingtons-disease/basics/treatment/con-20030685