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2. Cognition;Ashcraft,2002
3. Use of a personal diary written on the ICU during critical illness;Backman;Intensive Care Med,2001
4. Content analysis in communication research;Berelson,1971
5. Patients’ expericences of respiratory treatment. A retrospective study of the influence of medical and nursing factors on recall, experience of discomforts, and feelings of security and insecurity;Bergbom-Engberg,1989