John R. Barr

Vitamin E Acetate in Bronchoalveolar-Lavage Fluid Associated with EVALI

Benjamin C. Blount, Mateusz P. Karwowski, Peter G. Shields et al. · New England Journal of Medicine · 2019 · 775 citations · Full text

Pharmacy, Clinical Toxicology, Toxicology +17

IFCC Reference System for Measurement of Hemoglobin A1c in Human Blood and the National Standardization Schemes in the United States, Japan, and Sweden: A Method-Comparison Study

Wieland Hoelzel, Cas Weykamp, Jan‐Olof Jeppsson et al. · Clinical Chemistry · 2004 · 695 citations

Medicine, Hematology, Internal Medicine +13

Approved IFCC Reference Method for the Measurement of HbA1c in Human Blood

Jan‐Olof Jeppsson, Uwe Kobold, John R. Barr et al. · Clinical Chemistry and Laboratory Medicine (CCLM) · 2002 · 650 citations

Life Sciences, Biochemistry, Clinical Biochemistry +15

Harmonizing lipidomics: NIST interlaboratory comparison exercise for lipidomics using SRM 1950–Metabolites in Frozen Human Plasma

John A. Bowden, N. Alan Heckert, Candice Z. Ulmer et al. · Journal of Lipid Research · 2017 · 411 citations · Full text

Life Sciences, Biochemistry, Analytical Chemistry +16

Isotope dilution--mass spectrometric quantification of specific proteins: model application with apolipoprotein A-I

John R. Barr, Vincent L. Maggio, David Patterson et al. · Clinical Chemistry · 1996 · 340 citations

Life Sciences, Biochemistry, Analytical Chemistry +16