P. Kok

Biomarkers of exposure to low concentrations of benzene: a field assessment.

K. T. Tan, K. Tan, W. Phoon, 1996, Occupational and environmental medicine.

Evaluation of biomarkers for occupational exposure to benzene.

K. Chia, C. Ong, B. Lee, 1995, Occupational and environmental medicine.

Monitoring of exposure to cyclohexanone through the analysis of breath and urine.

C. Ong, K. Tan, S. Chia, 1991, Scandinavian journal of work, environment & health.

Blood and urinary benzene determined by headspace gas chromatography with photoionization detection: application in biological monitoring of low-level nonoccupational exposure

C. Ong, P. Kok, C. Ong, 1994, International archives of occupational and environmental health.

Urinary trans,trans-muconic acid determined by liquid chromatography: application in biological monitoring of benzene exposure.

C. Ong, C. Shi, B. L. Lee, 1993, Clinical chemistry.