Pieper M.JC, van der Steen J.T, Francke A.L, Scherder E.JA, Twisk J.WR, Achterberg W.P.  2018.  Effects on pain of a stepwise multidisciplinary intervention (STA OP!) that targets pain and behavior in advanced dementia: A cluster randomized controlled trial. Palliat Med. 32(3):682-692.

van der Steen J.T, Mitchell S.L, Frijters D.H, Kruse R.L, Ribbe M.W.  2007.  Prediction of 6-month mortality in nursing home residents with advanced dementia: validity of a risk score. Journal of the American Medical Directors Association. 8(7):464-8.