For many, the highlight of the Cupcake Tea at Philadelphia's Rittenhouse Hotel was the chance to honor Boston Children's Hospital's Dr. Alessandra Biffi for her pioneering work in gene therapy. The families who were helped by Dr. Biffi's research offered the most moving tributes. Amy Price and Becky Vivian provided a powerful human account of what this research has meant to children and families across the globe Excerpt from a letter by Amy Price, mother of Liviana, Giovan