Guardant scores FDA approval for liquid biopsy test August 10, 2020 Auto Bot AstraZeneca, BioPharma, biopharma nl, California, Diagnostics, Guardant Health, Liquid Biopsy, osimertinib, Redwood City, Tagrisso 0 In a phone interview, Guardant Health CEO Helmy Eltoukhy said he expected the approval to encourage coverage by those payers still on the sidelines.