 Postoperatively the patients receive a questionnaire for selfdocumentation.Variables recorded include postoperative pain, hypocalcaemic symptoms, breathing problems, cervical discomforts of pressureglobus and voice disturbances. A visual analogue scale VAS is used when appropriate. The intake of oral analgesics and calcium medication is also recorded. The questionnaire is used daily for the first four postoperative days, and thereafter weekly for four weeks. 