Development of a Detection System for <i>ESR1</i> Mutations in Circulating Tumour DNA Using PNA-LNA-Mediated PCR Clamping oleh Yuki Kojima, Emi Noguchi, Tomomi Yoshino, Shigehiro Yagishita, Shu Yazaki, Hitomi S. Okuma, Tadaaki Nishikawa, Maki Tanioka, Kazuki Sudo, Tatsunori Shimoi, Ayaka Kazama, Hiroshi Terasaki, Sachiro Asano, Yasuhiro Fujiwara, Akinobu Hamada, Kenji Tamura, Kan Yonemori