title: Tetrahydrobiopterin does not affect end-organ responsiveness to norepinephrine-mediated vasoconstriction in aged skin.
authors.affiliation: Pennsylvania State University, Noll Laboratory, Department of Kinesiology, University Park, Pennsylvania, USA. lang@hendrix.edu
authors.forename: James A
authors.initials: JA
authors.lastname: Lang
authors.forename: Lacy A
authors.initials: LA
authors.lastname: Holowatz
authors.forename: W Larry
authors.initials: WL
authors.lastname: Kenney