>"kids would still be dying of leukemia today instead of having a 90% remission rate today" Do you know a good source for the historical data? I am wondering h

>"kids would still be dying of leukemia today instead of having a 90% remission rate today" Do you know a good source for the historical data? I am wondering how they rule out that in the 1950s/60s they saw only much sicker patients, while today a bigger population gets diagnosed and treated. Related, there may be lead time bias: https://en.wikipedia.org/wiki/Lead_time_bias https://en.wikipedia.org/wiki/Lead_time_bias Any source with discussion of these methodological issues would be helpful.