The remaining 10 patients have JAGN1 deficiency (n = 1) [117]; poikiloderma with neutropenia (n = 1) [107]; cystic fibrosis (n = 1) [19]; leukocyte adhesion deficiency type 3 (n = 1) [65]; GATA2 deficiency (n = 1) [95]; undefined leukopenia (n = 1) [46]; and unspecified phagocytic diseases (n = 4) [52, 63, 101, 124]. The gene discussed is GATA2; the disease is cystic fibrosis.