title: New advances in analytical methods and assessment tools to identify deficiency and metabolic risk.
authors.affiliation: aResearch Group on Geriatrics, Charite University Medicine Berlin, Berlin, Germany bDepartments of Chemistry and Medicine, The University of Vermont, Burlington, VT, USA.
authors.forename: Kristina
authors.initials: K
authors.lastname: Norman
authors.forename: Dwight E
authors.initials: DE
authors.lastname: Matthews