Use of Kalydeco in Children Ages 2 to 5: Vertex today announced the submission of an NDA in the United States for the approval of Kalydeco in children with CF ages 2 to 5 who have one of the following nine mutations in the CFTR gene: G551D, G178R, S549N, S549R, G551S, G1244E, S1251N, S1255P...