20210207012200.0 Japan Journal of transcatheter valve therapies https://www.jstage.jst.go.jp/browse/jtvt/list/-char/en Journal of transcatheter valve therapies. 2434-4532 portico Portico 2019/2023 2024-03-26 Preserved : 2019: 1, 2020: 2, 2021: 3, 2022: 4, 2023: 5 Preserved : 2019: 1(1), 2020: 2(1), 2021: 3(1), 2022: 4(1), 2023: 5(1) Preserved J-STAGE Journal of Transcatheter Valve Therapies 2434-4532 Journal of transcatheter valve therapies 2434-4532 Journal of transcatheter valve therapies. 2434-4532 2434-4532 2434-4532