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    Results: 1 to 20 of 190

    1.

    Isotope-dilution assay for urinary methylmalonic acid in the diagnosis of vitamin B12 deficiency. A prospective clinical evaluation.

    Matchar DB, Feussner JR, Millington DS, Wilkinson RH Jr, Watson DJ, Gale D.

    Ann Intern Med. 1987 May;106(5):707-10.PMID: 3551712 [PubMed - indexed for MEDLINE]Related articles

    2.

    Cobalamin (vitamin B12) deficiency detection by urinary methylmalonic acid quantitation.

    Norman EJ, Martelo OJ, Denton MD.

    Blood. 1982 Jun;59(6):1128-31.PMID: 7082819 [PubMed - indexed for MEDLINE]Related articlesFree article

    3.

    Use of fasting urinary methylmalonic acid to screen for metabolic vitamin B12 deficiency in older persons.

    Kwok T, Cheng G, Lai WK, Poon P, Woo J, Pang CP.

    Nutrition. 2004 Sep;20(9):764-8.PMID: 15325684 [PubMed - indexed for MEDLINE]Related articles

    4.

    Screening elderly populations for cobalamin (vitamin B12) deficiency using the urinary methylmalonic acid assay by gas chromatography mass spectrometry.

    Norman EJ, Morrison JA.

    Am J Med. 1993 Jun;94(6):589-94.PMID: 8506883 [PubMed - indexed for MEDLINE]Related articles

    5.

    Solid-phase sample extraction for rapid determination of methylmalonic acid in serum and urine by a stable-isotope-dilution method.

    Rasmussen K.

    Clin Chem. 1989 Feb;35(2):260-4.PMID: 2644059 [PubMed - indexed for MEDLINE]Related articlesFree article

    6.

    Performance of the serum cobalamin assay for diagnosis of cobalamin deficiency.

    Matchar DB, McCrory DC, Millington DS, Feussner JR.

    Am J Med Sci. 1994 Nov;308(5):276-83.PMID: 7977446 [PubMed - indexed for MEDLINE]Related articles

    7.

    High prevalence of cobalamin deficiency in elderly outpatients.

    Pennypacker LC, Allen RH, Kelly JP, Matthews LM, Grigsby J, Kaye K, Lindenbaum J, Stabler SP.

    J Am Geriatr Soc. 1992 Dec;40(12):1197-204.PMID: 1447433 [PubMed - indexed for MEDLINE]Related articles

    8.

    [Diagnosis of vitamin B12 deficiency revised]

    Wiersinga WJ, de Rooij SE, Huijmans JG, Fischer C, Hoekstra JB.

    Ned Tijdschr Geneeskd. 2005 Dec 10;149(50):2789-94. Review. Dutch. PMID: 16385831 [PubMed - indexed for MEDLINE]Related articles

    9.

    Sensitivity of serum methylmalonic acid and total homocysteine determinations for diagnosing cobalamin and folate deficiencies.

    Savage DG, Lindenbaum J, Stabler SP, Allen RH.

    Am J Med. 1994 Mar;96(3):239-46.PMID: 8154512 [PubMed - indexed for MEDLINE]Related articles

    10.

    Elevated methylmalonic acid and total homocysteine levels show high prevalence of vitamin B12 deficiency after gastric surgery.

    Sumner AE, Chin MM, Abrahm JL, Berry GT, Gracely EJ, Allen RH, Stabler SP.

    Ann Intern Med. 1996 Mar 1;124(5):469-76.PMID: 8602704 [PubMed - indexed for MEDLINE]Related articlesFree article

    11.

    Assay of methylmalonic acid in the serum of patients with cobalamin deficiency using capillary gas chromatography-mass spectrometry.

    Stabler SP, Marcell PD, Podell ER, Allen RH, Lindenbaum J.

    J Clin Invest. 1986 May;77(5):1606-12.PMID: 3700655 [PubMed - indexed for MEDLINE]Related articlesFree article

    12.

    Applicability of an enzymatic quantitation of methylmalonic, propionic, and acetic acids in normal and megaloblastic states.

    Frenkel EP, Kitchens RL.

    Blood. 1977 Jan;49(1):125-37.PMID: 830370 [PubMed - indexed for MEDLINE]Related articlesFree article

    13.

    Urinary methylmalonic acid to detect vitamin B12 deficiency.

    Norman EJ.

    JAMA. 1995 May 10;273(18):1420. No abstract available. PMID: 7723154 [PubMed - indexed for MEDLINE]Related articles

    14.

    Urinary methylmalonic acid/creatinine ratio: a gold standard test for tissue vitamin B12 deficiency.

    Norman EJ.

    J Am Geriatr Soc. 1999 Sep;47(9):1158-9. No abstract available. PMID: 10484267 [PubMed - indexed for MEDLINE]Related articles

    15.

    [Assessment of laboratory findings in megaloblastic anemia--measurement of serum vitamin B12 and methylmalonic acid]

    Kondo H, Kakinuma H, Kanazawa S, Iseki T, Goto S, Ohto M, Yonemitsu H, Okuda K.

    Rinsho Ketsueki. 1989 Jan;30(1):36-44. Japanese. PMID: 2654448 [PubMed - indexed for MEDLINE]Related articles

    16.

    Methylmalonic acid quantification by stable isotope dilution gas chromatography-mass spectrometry from filter paper urine samples.

    McCann MT, Thompson MM, Gueron IC, Lemieux B, Giguère R, Tuchman M.

    Clin Chem. 1996 Jun;42(6 Pt 1):910-4.PMID: 8665683 [PubMed - indexed for MEDLINE]Related articlesFree article

    17.

    New urinary methylmalonic acid test is a sensitive indicator of cobalamin (vitamin B12) deficiency: a solution for a major unrecognized medical problem.

    Norman EJ.

    J Lab Clin Med. 1987 Sep;110(3):369-70. No abstract available. PMID: 3611958 [PubMed - indexed for MEDLINE]Related articles

    18.

    Functional vitamin B12 deficiency and determination of holotranscobalamin in populations at risk.

    Herrmann W, Obeid R, Schorr H, Geisel J.

    Clin Chem Lab Med. 2003 Nov;41(11):1478-88.PMID: 14656029 [PubMed - indexed for MEDLINE]Related articles

    19.

    [Urinary methylmalonic acid excretion and clinical features in megaloblastic anemia due to vitamin B12 deficiency]

    Yamauchi H, Omine M, Tsukamoto N, Katahira H, Karasawa M, Sugita Y, Yatabe H, Iwata N, Maekawa T.

    Rinsho Ketsueki. 1989 Jun;30(6):835-9. Japanese. PMID: 2795894 [PubMed - indexed for MEDLINE]Related articles

    20.

    Problems with vitamin B12 assays.

    Balfour IC, Lane DW.

    Lancet. 1980 Dec 6;2(8206):1246. No abstract available. PMID: 6108414 [PubMed - indexed for MEDLINE]Related articles

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