The FNV trade union federation has called on members who develop breast cancer to come forward if they spent at least 10 years working night shifts, Trouw reports on Monday.

The paper says the move follows developments in Denmark, where breast cancer is listed as a possible occupational health risk by people who work night shifts for at least 15 years. So far, some 10 nurses have won damages, the paper says.
Researchers say that chronic disturbances to the body’s day and night rhythms can influence the production of the hormone melatonin. Melatonin disturbances have been linked to breast cancer, the paper says.
The union wants new guidelines on night shifts introduced in the Netherlands.
The health ministry told NOS tv that it wants more research to be carried out on the possible link.