The impact of carbapenem shortage and stewardship countermeasures on antimicrobial practice at a tertiary care center oleh Yuichi Kouyama, Yuki Uehara, Akane Takamatsu, Ryota Suzuki, Rie Nishida, Katsumasa Inuzuka, Eriko Muramatsu, Koji Ohyama, Yohei Doi, Shigeki Yamada, Hitoshi Honda