There is a concentration of people with "Norrbottnian congenital insensitivity to pain" in Norrbotten in northern Sweden: http://www.slideshare.net/gejanmin/200

There is a concentration of people with "Norrbottnian congenital insensitivity to pain" in Norrbotten in northern Sweden: http://www.slideshare.net/gejanmin/20090801-hsan-presentation http://www.slideshare.net/gejanmin/20090801-hsan-presentatio...