25 July 2017 - When Maria and Loren Calder found out their father had lung cancer, they didn't think they would be the ones who would help to save him.

"There are no words," Maria said. "You've got your healthy, hardworking Dad. We're all very close. As his daughters, you go into warrior mode."

In February 2015, then 62-year-old Peter was told his suspected laryngitis was cancer. Two rounds of chemotherapy and a dose of radiation worked at first, but couldn't halt its spread.

His daughters helped him tick his bucket list - hot air ballooning, and motor racing with Greg Murphy – but they hadn't given up on their dad, and also began to research treatments he wasn't being offered by his doctors.

It led them to the ground-breaking new immunotherapy drug, pembrolizumab, known as Keytruda.

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