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Seifert, Eberhard; Kollbrunner, Juerg (2007). Vocal cord dysfunction: dealing with aggressivity. Swiss medical weekly, 137(7-8), pp. 127-9. Muttenz: EMH Schweizerischer Ärzteverlag
Seifert, Eberhard; Kollbrunner, Juerg (2006). An update in thinking about nonorganic voice disorders. Archives of otolaryngology--head & neck surgery, 132(10), pp. 1128-32. Chicago, Ill.: American Medical Association 10.1001/archotol.132.10.1128
