P C Elwood
P C Elwood
1Medical Research Council, Epidemiological Research Unit, the Institute of Pathology, Cardiff
2Medical Unit of the Welsh National School of Medicine, Cardiff
3Cardiff Schools Medical Service
1,2,3,
J L Withey
J L Withey
1Medical Research Council, Epidemiological Research Unit, the Institute of Pathology, Cardiff
2Medical Unit of the Welsh National School of Medicine, Cardiff
3Cardiff Schools Medical Service
1,2,3,
G S Kilpatrick
G S Kilpatrick
1Medical Research Council, Epidemiological Research Unit, the Institute of Pathology, Cardiff
2Medical Unit of the Welsh National School of Medicine, Cardiff
3Cardiff Schools Medical Service
1,2,3,
W Powell-Phillips
W Powell-Phillips
1Medical Research Council, Epidemiological Research Unit, the Institute of Pathology, Cardiff
2Medical Unit of the Welsh National School of Medicine, Cardiff
3Cardiff Schools Medical Service
1,2,3,
C W Anderson
C W Anderson
1Medical Research Council, Epidemiological Research Unit, the Institute of Pathology, Cardiff
2Medical Unit of the Welsh National School of Medicine, Cardiff
3Cardiff Schools Medical Service
1,2,3,
E Davies
E Davies
1Medical Research Council, Epidemiological Research Unit, the Institute of Pathology, Cardiff
2Medical Unit of the Welsh National School of Medicine, Cardiff
3Cardiff Schools Medical Service
1,2,3,
B Mead
B Mead
1Medical Research Council, Epidemiological Research Unit, the Institute of Pathology, Cardiff
2Medical Unit of the Welsh National School of Medicine, Cardiff
3Cardiff Schools Medical Service
1,2,3