Correction to: Journal of Echocardiography 10.1007/s12574-020-00487-5
In the original publication of the article, the text citations of the Figs. 4-1, 4-2 and 5 should be Figs. 4, 5 and 6.
The original article has been corrected.
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Yoshihiro Seo, Email: yo-seo@med.nagoya-cu.ac.jp.
the member of the joint committee of the Education Committee, Public Relations Committee, Guidelines Committee of the Japanese Society of Echocardiography:
Yasushi Sakata, Hiroyuki Toide, Kazumi Akasaka, Katsuji Inoue, Tetsuari Ohnishi, Kaoru Dohi, Tsuyoshi Yoshimuta, Nozomi Watanabe, Toshimi Koitabashi, Takako Iino, Kaoru Komuro, Atsushi Kobayashi, Akihiro Hayashida, Naoko Mizukami, Kumiko Hirata, Yasuaki Wada, Atsushi Kotani, Kiyohiro Takigiku, Makoto Miyake, Hiroki Okaniwa, Yutaka Hirano, Mitsushige Murata, and Kengo Suzuki