At three years old, Evan Lindberg was diagnosed with neuroblastoma, a childhood cancer that develops in nerve tissue outside the brain. By that time, tumours had spread through his small body. Chemotherapy, radiation, immunotherapy and multiple surgeries followed. “For four years, my son never had a day off,” says Evan’s father, Gavin. “He was either in treatment or recovery. And frequently recovery was worse than the treatment.” Evan died in 2010 at the age of seven.One of Evan’s doctors, paedi...