Phil and Andrea Marella with their son, Andrew, 20, and dog, Lacy, at their home in Greenwich. Andrew has a rare progressive genetic disorder called Niemann-Pick disease type C (NPC), which took the life of his sister, Dana, in 2013. The Marella's non-profit Dana?'s Angels Research Trust (DART) raises money to research the disease and is holding the DART to the Finish charity walk at Greenwich Point Park on Saturday, Oct. 5. Photo: Tyler Sizemore / Hearst Connecticut Media / Greenwich Time
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