Shane Sumlin of Shreveport is, by all accounts, a true survivor. This local financial advisor, husband and father of two, describes his battle with a rare disease as an ordeal that became as much a mental affliction as a physical one. His long journey began in 2011, at the age of 41. It began on a late November day when Shane began to feel some weakness in his legs. “And literally when I woke up the next morning my antibodies had really damaged most of my peripheral nervous…..