PT - JOURNAL ARTICLE AU - Longworth, David L. TI - Discussion DP - 1993 May 01 TA - Cleveland Clinic Journal of Medicine PG - 188--188 VI - 60 IP - 3 4099 - http://www.ccjm.org/content/60/3/188.short 4100 - http://www.ccjm.org/content/60/3/188.full SO - Cleve Clin J Med1993 May 01; 60