TY - JOUR T1 - Practical Occupational Medicine JF - Occupational and Environmental Medicine JO - Occup Environ Med SP - 432 LP - 432 DO - 10.1136/oem.52.6.432-a VL - 52 IS - 6 AU - T C Aw Y1 - 1995/06/01 UR - http://oem.bmj.com/content/52/6/432.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -