In the review by Frakking et al. [22] investigating the correlation of infection in pediatric oncology patients with MBL deficiency and/or severity of infection, no relationship was found between low MBL levels and presence of sepsis, bacteremia, or fungal infection in 3 of the 5 studies, while the results of the other 2 studies were to the contrary. Here, MBL2 is linked to hyperinsulinemic hypoglycemia, familial, 4.