RT Journal Article SR Electronic T1 Thinker’s sign JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 439 OP 439 DO 10.3949/ccjm.86a.19036 VO 86 IS 7 A1 Renée Grandjean A1 Lars C. Huber YR 2019 UL http://www.ccjm.org/content/86/7/439.abstract AB