[1] Aster MIMS, Dept Neurol, Calicut, Kerala, India
[2] WIMS Meppadi, Aster Specialty Hosp, Dept Neurol, Wayanad, Kerala, India
[3] WIMS Meppadi, Wayanad Inst Med Sci, Wayanad, Kerala, India
[4] Aster MIMS, Dept Neurosurg, Calicut, Kerala, India
[5] Gleneagles Global Hlth City, Dept Neurol, Chennai, India
[6] Aster MIMS, Dept Neurosci, Kozhikode 673016, India