TY - JOUR T1 - Introduction JF - Cleveland Clinic Journal of Medicine JO - Cleve Clin J Med SP - 419 LP - 419 VL - 51 IS - 2 AU - Donald G. Vidt AU - Alan Bakst Y1 - 1984/06/20 UR - http://www.ccjm.org/content/51/2/419.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -