[1] Univ Philippines Manila, Dept Neurosci, Coll Med, Manila, Philippines
[2] Univ Philippines Manila, Philippine Gen Hosp, Manila, Philippines
[3] Univ Philippines Manila, Dept Clin Epidemiol, Coll Med, Manila, Philippines
[4] Butuan Doctors Hosp, Dept Neurosci, Butuan City, Philippines
[5] Univ Philippines, Dept Rehabil Med, Coll Med, Manila, Philippines
[6] Univ Philippines, Philippine Gen Hosp, Manila, Philippines
[7] St Lukes Med Ctr, Dept Phys Med & Rehabil, Quezon City, Philippines