1Department of Neurology, The University of Texas Southwestern Medical Center, Dallas, Texas

2Department of Pharmacy Practice, Texas Tech University Health Science Center, Jerry H. Hodge School of Pharmacy, Dallas, Texas

Correspondence: DaiWai M. Olson, PhD, RN, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390-8855. Tel: 919-699-3122; E-mail: [email protected]

Competing interests: The authors report no conflicts of interest.