Boston Children’s Hospital is announcing Monday that it has started the world’s first hand transplant program for youngsters, with the goal of restoring limbs to victims of devastating infections, fires, or accidents. Amir Taghinia, HMS assistant professor of surgery and William Harmon, HMS professor of pediatrics, both of Boston Children’s Hospital; and Bohdan Pomahac, HMS associate professor of surgery of Brigham and Women’s Hospital, are quoted.