Chen H, McCoy LF, Schleicher RL, Pfeiffer CM. Measurement of 25-hydroxyvitamin D3 (25OHD3) and 25-hydroxyvitamin D2 (25OHD2) in human serum using liquid chromatography-tandem mass spectrometry and its comparison to a radioimmunoassay method. Clin Chim Acta. 2008;391:6-12. Full Text
Erhardt JG, Estes JE, Pfeiffer CM, Biesalski HK, Craft NE. Combined measurement of ferritin, soluble transferrin receptor, retinol binding protein, and C-reactive protein by an inexpensive, sensitive, and simple sandwich enzyme-linked immunosorbent assay technique. J Nutr. 2004 Nov;134(11):3127-32. Full Text
Fazili Z, Pfeiffer CM. Measurement of folates in serum and conventionally prepared whole blood lysates: application of an automated 96-well plate isotope-dilution tandem MS method. Clin Chem. 2004;50:2378-81. Full Text
Blanck HM, Pfeiffer CM, Caudill SP, Reyes R, Gunter EW, Imperatore G. Serum iron and iron-binding capacity: a round-robin interlaboratory comparison study. Clin Chem. 2003; 49:1672-75. Full Text
Caldwell KL, Maxwell CB, Makhmudov A, Pino S, Braverman LE, Jones RL, Hollowell JG. Use of inductively coupled plasma mass spectrometry to measure urinary iodine in NHANES 2000: comparison with previous method. Clin Chem 2003 Jun;49(6 Pt 1):1019-21. Full Text
Dearth-Wesley T, Makhmudov A, Pfeiffer CM, Caldwell CM. Fast and reliable salt iodine measurement: evaluation of the WYD Iodine Checker in comparison with iodometric titration. Food and Nutrition Bulletin. 2004:25(2):130-36. Full Text
Caldwell KL, Jones RL, Hollowell JG. Urinary iodine concentration: United States National Health and Nutrition Examination Survey 2001-2002. Thyroid. 2005;15(7):692-99. Full Text
Caldwell KL, Miller GA, Wang RY, Jain RB, Jones RL. Iodine status of the U.S. population, national health and nutrition examination survey 2003-2004. Thyroid 2008 Nov;18(11):1207-14. Full Text
Cogswell ME, Looker AC, Pfeiffer CM, Cook JD, Lacher DA, Beard JL, Lynch SR, Grummer-Strawn LM. Assessment of iron deficiency in US preschool children and nonpregnant females of childbearing age: National Health and Nutrition Examination Survey 2003-2006. Am J Clin Nutr. 2009 May;89(5):1334-42. Epub 2009 Apr 8. Full Text
Dorgan JF, Boakye NA, Fears TR, Schleicher RL, Helsel W, Anderson C, Robinson J, Guin JD, Lessin S, Ratnasinghe LD, Tangrea JA. Serum carotenoids and alpha-tocopherol and risk of nonmelanoma skin cancer. Cancer Epidemiol Biomarkers Prev. 2004 Aug;13(8):1276-82. Full Text
Hertrampf E, Cortés F, Erickson JD, Cayazzo M, Freire W, Bailey LB, Howson C, Kauwell GP, Pfeiffer C. Consumption of folic acid-fortified bread improves folate status in women of reproductive age in Chile. J Nutr. 2003 Oct;133(10):3166-9. Full Text
Huang LL, Coleman HR, Kim J, de Monasterio F, Wong WT, Schleicher RL, Ferris FL, Chew EY, et al. Oral supplementation of lutein/zeaxanthin and omega-3 long chain polyunsaturated fatty acids in persons aged 60 years or older, with or without AMD. Invest Opthalmol Vis Sci. 2008;49:3864-69. Full Text
Caldwell CL, Makmudov A, Jones RL, Hollowell JG. EQUIP: a worldwide program to ensure the quality of urinary iodine procedures. Accred Qual Assur. 2005;10(7):356-61. Full Text
Caudill SP, Schleicher RL, Pirkle JL. Multi-rule quality control for the age-related eye disease study. Stat Med. 2008 Sep 10;27(20):4094-106. Full Text
Drammeh BS, Schleicher RL, Pfeiffer CM, Jain RB, Zhang M, Nguyen PH. Effects of delayed specimen processing and freezing on serum concentrations of selected nutritional indicators. Clin Chem. 2008;54:1883-91. Full Text