Gender differences in the association of individual social class and neighbourhood unemployment rate with prevalent type 2 diabetes mellitus: a cross-sectional study from the DIAB-CORE consortium - Müller, Grit; Härtwig, Saskia Juliane; Greiser, Karin Halina; Moebus, Susanne; Pundt, Noreen; Schipf, Sabine; Völzke, Henry; Maier, Werner; Meisinger, Christa; Tamayo, Teresa; Rathmann, Wolfgang; Berger, Klaus (BMJ open, 2013)