BOSTON — U.S. Coast Guard rescue crews have transported a premature infant from Martha's Vineyard to Boston for specialized care.The Coast Guard said on Saturday that Martha's Vineyard Hospital requested help to transport baby Gabriella and her mother from Oaks Bluff to Tufts Medical Center in Boston shortly before midnight Friday.Coast Guard crews from Cape Cod picked up a neonatal team and incubator at Boston Logan Airport and took them to Martha's Vineyard Hospital.