[1] Amgen Inc, Thousand Oaks, CA USA
[2] AstraZeneca, Purificat Proc Sci, Gaithersburg, MD USA
[3] CSL Behring, Plasma Prod Dev Res & Dev, Bradley, IL USA
[4] Natl Inst Stand & Technol, Biomol Measurement Div, Gaithersburg, MD USA
[5] AstraZeneca, Dev Qual Biol, Gaithersburg, MD USA
[6] Merck KGaA, Darmstadt, Germany
[7] Natl Inst Innovat Mfg Biopharmaceut, Newark, DE USA
[8] Amgen Inc, 1 Amgen Ctr Dr, Thousand Oaks, CA 91320 USA
[9] Natl Inst Innovat Mfg Biopharmaceut, Newark, DE 19713 USA