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
Haynes BMH, Schleicher RL, Jain RB, Pfeiffer CM. The CDC VITAL-EQA program, external quality assurance for serum retinol 2003-2006. Clin Chim Acta. 2008;390:90-96. Full Text
Nelson BC, Pfeiffer CM, Zhang M, Duewer DL, Sharpless KE, Lippa KA. Commutability of NIST SRM 1955 homocysteine and folate in frozen human serum with selected total homocysteine immunometri and enzymatic assays. Clin Chim Acta. 2008;395:99-105. Full Text
Pearce EN. U.S. Iodine Nutrition: Where Do We Stand? Thyroid. 2008;18(11):1143-45. Full Text
Satterfield MB, Sniegoski LT, Sharpless KE, Welch MJ, Hornikova A, Zhang NF, Pfeiffer CM, Fazili Z, Zhang M, Nelson BC. Development of a new standard reference material: SRM 1955 (homocysteine and folate in human serum). Anal Bioanal Chem. 2006 Jun;385(3):612-22. Full Text
Thorpe SJ, Heath A, Blackmore S, Lee A, Hamilton M, O'Broin S, Nelson BC, Pfeiffer CM, et al. International standard for serum vitamin B12 and serum folate: international collaborative study to evaluate a batch of lyophilized serum for B12 and folate content. Clin Chem Lab Med. 2007;45:380-86. Full Text