Please note; WHO class as reported in PMID:22293322 and Luzzatto, L. & Poggi, V. Glucose-6-Phosphate Dehydrogenase Deficiency In: Nathan and Oski's Hematology of Infancy and Childhood, 7th Edition (ed. Meloni, D., Anderson, A. Authors of the book: Orkin, S.H., Fisher, D.E., Look, A.T., Lux IV, S.E., Ginsburg, D., Nathan, D.G. ) (Saunders, Elsevier., 2009) or individual references. This class may have been assigned based on just clinical
manifestations and not enzyme activity level or characterization of the enzyme variant.