PT - JOURNAL ARTICLE ED - Wilke, William S. TI - Itroduction DP - 1988 Nov 01 TA - Cleveland Clinic Journal of Medicine PG - 497--497 VI - 55 IP - 6 4099 - http://www.ccjm.org/content/55/6/497.1.short 4100 - http://www.ccjm.org/content/55/6/497.1.full SO - Cleve Clin J Med1988 Nov 01; 55