Erratum to: TG13 indications and techniques for gallbladder drainage in acute cholecystitis (with videos). Issue 5 (June 2013) - Tsuyuguchi, Toshio; Itoi, Takao; Takada, Tadahiro; Strasberg, Steven M.; Pitt, Henry A.; Kim, Myung‐Hwan; Supe, Avinash N.; Mayumi, Toshihiko; Yoshida, Masahiro; Miura, Fumihiko; Gomi, Harumi; Kimura, Yasutoshi; et al.