1. Demografie van de vergrijzing. [Demography of aging];Garssen,2011
2. 10 facts on ageing and the life course;World Health Organization,2012
3. Cancer facts and figures 2012;American Cancer Society,2012
4. Kanker in Nederland tot 2020: trends en prognoses. [Cancer in the Netherlands up to 2020: trends and prognoses], 2011;Dutch Cancer Society,2012
5. Older adults, health information, and the world wide web;Morrell,2002