N Engl J Med. 1971 Apr 15;284(15):878-81. doi: 10.1056/NEJM197104222841604. N Engl J Med. 1971. PMID: 5549830 No abstract available.
. Ann Clin Transl Neurol. 2018 Nov 9;6(1):154-160. doi: 10.1002/acn3.661. eCollection 2019 Jan. Ann Clin Transl Neurol. 2018. PMID: 30656193
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