RT Journal Article SR Electronic T1 The double-tongue sign JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 435 OP 436 DO 10.3949/ccjm.89a.21080 VO 89 IS 8 A1 Nami Yoshimura A1 Takashi Watari A1 Keisuke Misao A1 Toshihiro Imada A1 Junji Mashino YR 2022 UL http://www.ccjm.org/content/89/8/435.abstract AB