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Adenine phosphoribosyltransferase deficiency
Methylenetetrahydrofolate reductase deficiency
Purine nucleoside phosphorylase deficiency
Dihydropyrimidine dehydrogenase deficiency
Adenosine deaminase deficiency
Adenosine deaminase 2 deficiency
Ribose-5-phosphate isomerase deficiency
Dihydrofolate reductase deficiency