[1] Penn State Univ, Hershey Med Ctr, Dept Neurol, Hershey, PA USA
[2] Penn State Univ, Dept Publ Hlth Sci, Hershey, PA USA
[3] Med Univ South Carolina, Dept Med, Charleston, SC USA
[4] Hlth Equ & Rural Outreach Innovat Ctr HERO, Ralph H Johnson VA Med Ctr, Charleston, SC USA
[5] Univ Yaounde, Fac Med & Biomed Cal Sci, Yaounde, Cameroon
[6] Med Univ South Carolina, Dept Neurol, Charleston, SC USA
[7] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA