[1] Hosp Univ Puerta Hierro Majadahonda, Cardiol Dept, Madrid, Spain
[2] Spanish Natl Ctr Cardiovasc Res CNIC, B Lymphocyte Biol Lab, Madrid, Spain
[3] Hosp Infantil La Paz, Pediat Gastroenterol, Madrid, Spain
[4] Hosp Gen Univ Doctor Balmis, Dept Surg, Alicante, Spain
[5] Hosp Infantil La Paz, Dept Cirugia Pediat, Madrid, Spain
[6] Hosp Infantil La Paz, Dept Cirugia Pediat, Madrid, Spain
[7] Hosp Infantil Univ La Paz, Dept Neurol, Madrid, Spain