TY - JOUR A1 - Duncan, C. A1 - Jones, K. A1 - Moon, G. T1 - Context, composition and heterogeneity: using multilevel models in health research Y1 - 1998 DO - 10.1016/S0277-9536(97)00148-2 JF - Social Science & Medicine VL - 46 IS - 1 SP - 97 EP - -117 ER -