Fig. 1: Summary of the Taizhou longitudinal study (TZL).
From: Non-invasive early detection of cancer four years before conventional diagnosis using a blood test
The flowchart shows recruitment, baseline survey, sample collection, and cohort follow-up for TZL. Qualified pre-diagnosis patients and healthy participants were selected from the TZL cohort and qualified post-diagnosis patients were selected from local Taizhou hospital biobanks; 328 samples were processed but later excluded due to not meeting inclusion criteria or failing quality control metrics.
