PT - JOURNAL ARTICLE AU - Olin, Jack S. TI - Cluster Headache DP - 1997 Jan 01 TA - Cleveland Clinic Journal of Medicine PG - 53--53 VI - 64 IP - 1 4099 - http://www.ccjm.org/content/64/1/53.short 4100 - http://www.ccjm.org/content/64/1/53.full SO - Cleve Clin J Med1997 Jan 01; 64