RT Journal Article SR Electronic T1 Understanding the bell-ringing of concussion JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 583 OP 583 DO 10.3949/ccjm.84b.08017 VO 84 IS 8 A1 Brian F. Mandell YR 2017 UL http://www.ccjm.org/content/84/8/583.abstract AB