1. Norwegian Knowledge Centre for the Health Services; Health Economics and Drugs Unit; PO Box 7004 St Olavs Plass Oslo Norway N-0130
2. Norwegian Knowledge Centre for the Health Services; Global Health Unit; Box 7004 St Olavsplass Oslo Norway N-0130
3. Medical Research Council of South Africa; Health Systems Research Unit; PO Box 19070 Tygerberg South Africa 7505
4. Norwegian Knowledge Centre for the Health Services; Postboks 7004 St. Olavsplass Oslo Norway 0130