Husebo, B.S., Achterberg, W.P., Lobbezoo, F., Kunz, M., Lautenbacher, S., Kappesser, J., Tudose, C. and Strand, L.I. 2012. Pain in patients with dementia: A review of pain assessment and treatment challenges. Norsk Epidemiologi. 22, 2 (Nov. 2012). DOI:https://doi.org/10.5324/nje.v22i2.1572.