Extended Data Figure 1. Distribution of cancer therapy received prior to blood collection for sequencing.

A) Frequency of patients receiving systemic therapy or external beam radiation therapy by primary tumor type. B) Frequency of patients receiving specific classes of systemic therapy by primary tumor type. C) Frequency of patients receiving top ten subclasses of cytotoxic therapy. Most patients (91%) who received at least one of these cytotoxic therapy classes received multiple classes.