RT Journal Article SR Electronic T1 Developments in Biological Standardization JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 78 OP 79 DO 10.1136/jech.47.1.78-b VO 47 IS 1 A1 Elizabeth Miller YR 1993 UL http://jech.bmj.com/content/47/1/78.3.abstract AB