Erratum to: J Inherit Metab Dis

DOI 10.1007/s10545-011-9300-1

In the original published article units for hemoglobin concentrations in blood are erroneously reported as g/dL instead as g/L. However, all neopterin and biopterin values reported in the text and tables are correct and calculated with Hb g/L.

We apologize for any inconvenience caused by this mistake.

The Authors