TY  - JOUR
TI  - Qualitative content analysis in nursing research: concepts, procedures and measures to achieve trustworthiness
AU  - Ulla Hällgren Graneheim
AU  - Berit Lundman
PY  - 2003
JO  - Nurse Education Today
DO  - 10.1016/j.nedt.2003.10.001
UR  - https://doi.org/10.1016/j.nedt.2003.10.001
ER  -