title: Expression of Concern: Sato et al. Effect of folate and mecobalamin on hip fractures in patients with stroke: a randomized controlled trial. JAMA. 2005;293(9):1082-1088.
authors.affiliation: Editor in Chief, JAMA.
authors.forename: Howard
authors.initials: H
authors.lastname: Bauchner
authors.affiliation: Executive Deputy Editor, JAMA.
authors.forename: Phil B
authors.initials: PB
authors.lastname: Fontanarosa