[OB7] Extraction of Medical Order Sequence Transition and Timing of Changes from Electric Medical Record Histories of COVID-19

*ZITAI ZHAO¹, MATSUO RYOUSUKE², YAMAZAKI TOMOYOSHI¹, RE- HYEUHAN¹, ARAKI KENJI³, YOKOTA HARUO¹ (1. Tokyo Institute of Technology, School of Computing, 2. Life Data Initiative, 3. University of Miyazaki Hospital)