Author's reply to 'bone metastasis of limb segments: is mesometastasis another poor prognostic factor of cancer patients?'. (22nd June 2020) - Tani, Shoichiro; Morizaki, Yutaka; Uehara, Kosuke; Sawada, Ryoko; Kobayashi, Hiroshi; Shinoda, Yusuke; Kawano, Hirotaka; Tanaka, Sakae