Direct comparison of an ultrasensitive real-time PCR assay with droplet digital PCR for the detection of PIK3CA hotspot mutations in primary tumors, plasma cell-free DNA and paired CTC-derived gDNAs - Smilkou, Stavroula; Kaklamanis, Loukas; Balgouranidou, Ioanna; Linardou, Helena; Papatheodoridi, Alkistis Maria; Zagouri, Flora; Razis, Evangelia; Kakolyris, Stylianos; Psyrri, Amanda; Papadimitriou, Christos; Markou, Athina; Lianidou, Evi (Frontiers in Oncology, 2024)