1. Bo Burström, Department of International Health and Social Medicine, Karolinska Institute, Address for correspondence and reprint requests: Bo Burström Karolinska Institute Department of International Health and Social Medicine S-17283 Sundbyberg Sweden
2. Bo JA Haglund, Department of International Health and Social Medicine, Karolinska Institute
3. Per Tillgren, Department of International Health and Social Medicine, Karolinska Institute
4. Lars Berg, Department of International Health and Social Medicine, Karolinska Institute
5. Eva Wallin, Department of International Health and Social Medicine, Karolinska Institute
6. Henrik Ullén, Department of Oncology, Karolinska Institute, Sweden
7. Christopher Smith, Health Promotion Wales, Cardiff, U.K.