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Boorsma M., Joling K., Dussel M., Ribbe M., Frijters D., van Marwijk H.W, Nijpels G., van Hout H..  2012.  The incidence of depression and its risk factors in Dutch nursing homes and residential care homes. Am J Geriatr Psychiatry. 20(11):932-42.

Boorsma M., Joling K.J, Frijters D.H, Ribbe M.E, Nijpels G., van Hout H.P.  2012.  The prevalence, incidence and risk factors for delirium in Dutch nursing homes and residential care homes. Int J Geriatr Psychiatry. 27(7):709-15.