PT - JOURNAL ARTICLE AU - Vidt, Donald G. TI - Introduction DP - 1994 Sep 01 TA - Cleveland Clinic Journal of Medicine PG - 327--327 VI - 61 IP - 5 4099 - http://www.ccjm.org/content/61/5/327.short 4100 - http://www.ccjm.org/content/61/5/327.full SO - Cleve Clin J Med1994 Sep 01; 61