RT Journal Article SR Electronic T1 Creatine phosphokinase content in cerebrospinal fluid JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 47 OP 51 VO 36 IS 1 A1 Culebras, Antonio A1 Richards, Nelson G. YR 1969 UL http://www.ccjm.org/content/36/1/47.abstract AB