Im 100% convinced, my mg was the direct result of stress.
Had shingles in sept of 2007, ended up in emergency room in march of 2008 with diverticulitis, and diagnosed with MG in march of 2009........and Im certain the stress I couldnt get rid of in my life destroyed my health in all three cases. No proof, but all three diseases came right in a row, in the most stressful time of my life, and all three seem to flourish with stress.