1. Howlader N, Noone AM, Krapcho M, Miller D, Brest A, Yu M, et al (eds) (2020) SEER Cancer Statistics Review, 1975–2017, National Cancer Institute. Bethesda, MD, https://seer.cancer.gov/csr/1975_2017/, based on November 2019 SEER data submission, posted to the SEER web site, April 2020
2. Bundesamt S BIB-Demografie.de. https://www.bib.bund.de/DE/Fakten/Fakt/S19-Todesursachenspezifische-Sterbeziffern-Frauen-Alter-ueber-65-ab-1980.html. Accessed 04/25/2020, time 16:30
3. Pilleron S, Sarfati D, Janssen-Heijnen M, Vignat J, Ferlay J, Bray F et al (2019) Global cancer incidence in older adults, 2012 and 2035: a population-based study. Int J Cancer 144(1):49–58
4. Parker SL, Tong T, Bolden S, Wingo PA (1997) Cancer statistics. CA Cancer J Clin 47(1):5–27
5. Geinitz H, Zimmermann FB, Molls M (1999) Radiotherapy of the elderly patient. Radiotherapy tolerance and results in older patients. Strahlenther Onkol 175(3):119–127