All patients were interviewed by A.S. or K.W.F. within 72 hours of admission to the hospital, using a standard- ized, structured questionnaire, consisting of both close- ended and open-ended questions. Both the patients and their relatives could answer the close-ended questions, whereas the open-ended questions had to be answered by the patients themselves. Those unable to answer the questions because of speech or language difficulties, reduced consciousness or cognitive impairment were excluded.