RT Journal Article SR Electronic T1 The blue eardrum—idiopathic hemotympanum JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 39 OP 42 VO 38 IS 1 A1 Gschwendtner, John F. A1 Geurkink, Nathan A. YR 1971 UL http://www.ccjm.org/content/38/1/39.abstract AB