Serum vitamin B12 concentrations within reference values do not exclude functional vitamin B12 deficiency in PKU patients of various ages.
Vugteveen
Inge
I
Section of Metabolic Diseases, Beatrix Children's Hospital, University Medical Centre of Groningen, University of Groningen, Groningen, The Netherlands.
Hoeksma
Marieke
M
Monsen
Anne-Lise Bjorke
AL
Fokkema
M Rebecca
MR
Reijngoud
Dirk-Jan
DJ
van Rijn
Margreet
M
van Spronsen
Francjan J
FJ
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006710:Homocysteine / Q000097:blood; D006801:Humans; D007223:Infant; D008297:Male; D008764:Methylmalonic Acid / Q000097:blood; D010661:Phenylketonurias / Q000097:blood / Q000150:complications* / Q000503:physiopathology; D012016:Reference Values; D012189:Retrospective Studies; D014805:Vitamin B 12 / Q000097:blood*; D014806:Vitamin B 12 Deficiency / Q000097:blood / Q000175:diagnosis / Q000209:etiology*; D055815:Young Adult
D006710:Homocysteine; D008764:Methylmalonic Acid; D014805:Vitamin B 12