[1] St Georges Univ, Sch Med, Dept Anat Sci, St Georges, Grenada
[2] St Georges Univ, Sch Med, Dept Physiol Neurosci & Behav Sci, St Georges, Grenada
[3] Tulane Univ, Sch Med, Dept Neurosurg, New Orleans, LA USA
[4] Tulane Univ, Sch Med, Dept Struct & Cellular Biol, New Orleans, LA USA
[5] Ochsner Hlth Syst, Dept Neurosurg, New Orleans, LA USA
[6] Ochsner Hlth Syst, Ochsner Neurosci Inst, New Orleans, LA USA
[7] St Georges Univ, Sch Med, Dept Pathol, St Georges, Grenada
[8] Mayo Clin, Dept Clin Anat, Rochester, MN 55905 USA
[9] Nicolaus Copernicus Super Sch, Coll Med Sci, Olsztyn, Poland