THE ASSOSIATION BETWEEN PROGRESSION OF FLAT FOOT AND KNEE DEFORMITY IN PATIENTS WITH KNEE OSTEOARTHRITIS -A STUDY WITH THREE-DIMENSIONAL UPRIGHT COMPUTED TOMOGRAPHY-. (April 2022) - Hakukawa, S.; Kaneda, K.; Yamada, Y.; Harato, K.; Sasaki, R.; Oki, S.; Kobayashi, S.; Niki, Y.; Nagura, T.; Jinzaki, M.; Nakamura, M.