 Streck cell-free DNA blood collection tubes, CFDNA BCTs, are suitable for collecting and storing blood samples for up to 3 days without affecting the quality of the CFDNA or the amount of genomic DNA present. This makes them ideal for use in oncological diagnostic tests such as molecular profiling of circulating tumor DNA, CTDNA. This article was authored by Inga Medina Diaz, Annette Nocaan, Stephanie A.E. Held and others.