sentences:  Founded in 1968 by Marjorie Guthrie, wife of folk legend Woody Guthrie who died of HD, the Society works to provide the family services, education, advocacy and research for the more than 30,000 people diagnosed with HD in the United States.HDSA supports and participates in the HD Drug Research Pipeline, which develops potential therapies to treat and eventually cure HD; and HDSA also supports 21 HDSA Centers of Excellence at major medical facilities throughout the U.S., where people with HD and their families receive comprehensive medical, psychological and social services, in addition to physical and occupational therapy and genetic testing and counseling.The Society comprises 46 local chapters and affiliates across the country with its headquarters in New York City.