There was a cluster in the Kii Peninsula of Japan and in Guam. Some have tried to link them to the Foxbat but Japanese sources say there are no Foxbats in the Kii Peninsula. I have heard of BMAA, personally, I do not think the poison hypothesis could possibly explain the data . . . Amyotrophic Lateral Sclerosis is practically every but what poison is similarly distributed I wonder? I don't think there is any and believe whatever it is, it must be very common, have a difficult 'infection' route and be practically invisible or Amyotrophic Lateral Sclerosis is actually several diseases with similar symptoms, yet this type of argument is hard to reconcile with familial Amyotrophic Lateral Sclerosis. Little can be ruled out because too much about the disease process(es) remains unknown. A common denominator of some kind possibly could be triggered by BMAA . . . . Thanks for sharing your thoughts. I hope you beat the big C!