Challenges in newborn screening for primary immunodeficiency among preterm infants: Clinical features of patients with low TREC/KREC values

Marika Amizuka, Saitama Medical University Hospital, General Medical Center, Saitama-shi, Saitama, Japan; Fumihiko Namba, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan; Kanako Itoh, Saitama medical center, Saitama medical university, Kawagoe, Saitama, Japan