TY - JOUR A1 - Goldstein, H. A1 - Browne, W. A1 - Rasbash, J. T1 - Multilevel modelling of medical data Y1 - 2002 DO - 10.1002/Sim.1264 JF - Statistics in medicine VL - 21 IS - 21 SP - 3291 EP - -3315 ER -