RT Journal Article SR Electronic T1 Rigid airway JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 334 OP 336 DO 10.3949/ccjm.87a.19129 VO 87 IS 6 A1 Masaki Itagane A1 Hiroyuki Yano A1 Tomoo Kishaba A1 Mitsuyo Kinjo YR 2020 UL http://www.ccjm.org/content/87/6/334.abstract AB