1. Research Centre for Prevention and Health; Glostrup University Hospital; Nordre Ringvej 57, Building 84/85 DK-2600 Glostrup Denmark
2. Section for Social Medicine, Department of Public Health; University of Copenhagen; Øster Farimagsgade 5, Box 2099 DK-2600 Copenhagen K Denmark
3. Department of Biostatistics; University of Copenhagen; Øster Farimagsgade 5 PB2099 DK-1014 Copenhagen K Denmark
4. Unit of Survivorship, Danish Cancer Society Research Center; Danish Cancer Society; Strandboulevarden 49 PB2099 DK-2100 Copenhagen Ø Denmark