BBC article on CIP:
https://www.bbc.com/future/article/20170426-the-people-who-never-feel-any-pain
Patient information on HSAN provided by the National Institutes of Health:
https://rarediseases.info.nih.gov/diseases/12688/hereditary-sensory-and-autonomic-neuropathy
Patient advocacy organization for patients with inherited polyneuropathy in Austria (CMT-Austria):
https://ecmtf.org/members/cmt-austria
Patient advocacy organization for patients with inherited polyneuropathy in the Czech Republic (Společnost C-M-T):
European Network on Inherited Sensory Neuropathies and Insensitivity to Pain 