“…Yet, most experience has centered on blood-lead assessment, where this exposure biomarker has been an important outcome variable in many intervention studies (Aschengrau et al, 1994;Hilts et al, 1998;Lanphear et al, 1999). In a wider sense, the use of personal clinicalchemistry results is well established in clinical management of certain diseases, especially serum-glucose monitoring in diabetes patients (Cox et al, 1991;Larsen et al, 1990). Also, cholesterol screening has a long history in the prevention of cardiovascular disease, because a serum result deemed disadvantageous motivates the subject to pursue available means to remain healthy (Elton et al, 1994;Reynolds et al, 1997;Strychnar et al, 1997).…”