PT - JOURNAL ARTICLE AU - D Koh AU - T-C Aw TI - SURVEILLANCE IN OCCUPATIONAL HEALTH AID - 10.1136/oem.60.9.705 DP - 2003 Sep 01 TA - Occupational and Environmental Medicine PG - 705--710 VI - 60 IP - 9 4099 - http://oem.bmj.com/content/60/9/705.short 4100 - http://oem.bmj.com/content/60/9/705.full SO - Occup Environ Med2003 Sep 01; 60