TY - JOUR T1 - Introduction JF - Cleveland Clinic Journal of Medicine JO - Cleve Clin J Med SP - 275 LP - 276 VL - 42 IS - 4 AU - Paul G. Dyment Y1 - 1975/12/21 UR - http://www.ccjm.org/content/42/4/275.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -