if you want a source for cannabis studies look at Israel. surprisingly they have a very robust cannabis research program. A lot of studies on the effectiveness of cannabis and derivatives come out of there.

A recent study on lung cancer and smoking CBD  high products found them to be effective in solid tumor reduction in the study. this is great news. but it is just a study with no clinical extensions or intent to start any. In the US research is hobbled and limited.

best lung cancer treatments are from the research out of Cuba. they have done some surprising stuff in the field and worth reading up on.