Suyatna, F.D., Priyanto, P., Istiantoro, J. and Sadikin, M. 2004. Oxidant and antioxidant status of police officer in the city and rural area. Medical Journal of Indonesia. 13, 2 (May 2004), 77-80. DOI:https://doi.org/10.13181/mji.v13i2.132.