Why are some families, like the Nolans, so affected by cancer?

Linda Nolan's passing at age 65 highlights the mystery of familial cancer risk, showing how unpredictable and complex cancer's relationship is with both environment and genetics.

Despite the Nolan sisters' success and fame, their struggles with cancer accentuate the randomness of the disease, provoking questions about why some families are more afflicted than others.

Read at Independent