A) cfDNA reference standard (Horizon Discovery Ltd, Cat# HD780) was spiked in TE buffer, followed by isolation with Apostle MiniMax High Efficiency cfDNA Isolation Kit (Type S). The isolated DNA was characterized by Bioanalyzer 2100 (red curve), and compared with original cfDNA reference standard (blue curve). Apostle MiniMax High Efficiency cfDNA Isolation Kit (Type S) offers >95% recovery of the cfDNA reference standard, which has significant portion of DNA fragments with size <100 bp.