Vishnu V Y, Kesav Praveen, Goyal Manoj Kumar, Modi Manish, Prabhakar Sudesh
From the Department of Neurology, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India.
Neurology. 2013 Oct 1;81(14):e110. doi: 10.1212/WNL.0b013e3182a6cbc3.