To qualify for compensation , women must have developed breast cancer after having worked at least one night shift a week for 20 to 30 years . Danish women who got breast cancer after night shift get treated . They should have worked at least one night a week for 20 to 30 years . WHO have concluded that working night shifts ` ` probably causes cancer ''
Danish women who got breast cancer after night shift get treated . They should have worked at least one night a week for 20 to 30 years . WHO have concluded that working night shifts ` ` probably causes cancer ''