TY - JOUR T1 - An 18th century trial JF - Journal of Epidemiology and Community Health JO - J Epidemiol Community Health SP - 214 LP - 214 DO - 10.1136/jech.47.3.214 VL - 47 IS - 3 A2 - , Y1 - 1993/06/01 UR - http://jech.bmj.com/content/47/3/214.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -