Huisman M, Groffen DA. Danielle A.I. Groffen. Material versus psychosocial explanations of socioeconomic differences in health-related function in older people. Proefschrift. Maastricht: Universitaire pers Maastricht, 2011. 158 p. TGG [Internet]. 2012 Mar. 21 [cited 2026 Apr. 11];(1). Available from: https://testplatform.openjournals.nl/tgg/article/view/16896