Anil Kapoor came from a family of doctors. Having become a leading urologist and renal transplant surgeon at St Joseph’s, Hamilton, Canada, it came as a shock when — aged only 58 years — he received a diagnosis of colorectal cancer. He was prescribed a chemotherapy regimen called ‘FOLFOX’, which includes 5-fluorouracil (5-FU), a medicine used to treat several different cancers. “None of us knew anything about these drugs,” says Vimal Kapoor, an emergency doctor at Markham Stouffville Hospital in Markham, Canada, and Anil’s younger brother.