The researchers examined the records of more than 6,000 women born in Helsinki between 1934 and 1944. Of these 300 developed breast cancer, and 48 went on to die from the disease.

• 研究者以在1934至1944年之间出生的6,000多名赫尔辛基女性作为研究东西，这些人中有300人患上乳腺癌，48人死于这种疾病。