1. CDC (2016) Centres for Disease Control and Prevention, US Dept. Health and Human Services. CDC wonder.
http://wonder.cdc.gov
. Accessed 15 June 2016
2. GBE (2016) Federal Statistical Office Germany: Statistisches Bundesamt, Gesundheitsberichterstattung (GBE) des Bundes.
http://www.gbe-bund.de
. Accessed 21 September 2016
3. GEKID (2016) Association of Populations-based Cancer Registries in Germany: GEKID database.
https://www.gekid.de
. Accessed 21 September 2016
4. GENESIS (2016) Federal Statistical Office Germany: Statistisches Bundesamt, GENESIS-Online Datenbank.
https://www-genesis.destatis.de
. Accessed 21 September 2016
5. ICRP (2007) The 2007 Recommendations of the International Commission on Radiological Protection. Publication 103, Annals of the ICRP, Pergamon Press, Oxford