Utility and optimal management of planned drug holidays during lenvatinib treatment in patients with unresectable differentiated thyroid cancer: a real-world multi-center study. - Mikoshiba T; Sekimizu M; Kono T; Nagai R; Kawasaki T; Sato Y; Ito F; Nakahara N; Shigetomi S; Ozawa H (Endocrine, 2024)