PMID: 4586609 [PubMed - indexed for MEDLINE]
N Engl J Med. 1975 May 15; 292(20):1062-3.
[N Engl J Med. 1975]
Dtsch Med Wochenschr. 1973 Dec 21; 98(51):2445-7.
[Dtsch Med Wochenschr. 1973]
Laryngoscope. 1974 Sep; 84(9):1489-506.
[Laryngoscope. 1974]
Br Med Bull. 1971 May; 27(2):136-41.
[Br Med Bull. 1971]
Radiol Clin North Am. 1972 Dec; 10(3):569-81.
[Radiol Clin North Am. 1972]
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