@rchen thank you for your interest!
Yes, I have kept the NEJM paper in my mind to extend the result to other cancers, such as breast cancer (In Asia, most breast cancer patients are young, opposite to the Western patients).
I wrote that I wanted to answer 'Does new drug or money cure more patients than health system', but I don't think we can answer this question with this simple protocols. But this would be the first step, for sure. Because this is the first study using HIRA's whole cancer patients, I wanted to start with simple protocol first. We need to refine the protocol after that as you mentioned.
Still, the comparison of overall incidence, mortality and the cost of each cancer across the countries would bring huge impact.