^a)The assay carried out in laboratory using UniCelR DxI 800 Cbl assay (Beckman Coulter, Brea, CA, USA). ^b)The assay carried out in laboratory using Elecsys E170 Cbl assay (Roche Diagnostics Corp, Indianapolis, IN, USA). ^c)Intrinsic factor antibodies were detected by a solid phase enzyme immunoassay with highly purified intrinsic factor purified from porcine gastric mucosa as the antigen and performed as per the manufacturer's instructions (EuroImmun, Lübeck, Germany).

Abbreviations: NR, normal range; MCV, mean cell volume.