Huysal, K., Üstündağ, Y., Çağlak, H. A., & Yeşil, M. R. (2023). Reducing the Need for Repeat Urine Drug Testing with the Gray Zone Determined by the Measurement Uncertainty: Gray Zone for Urine Drug Testing. Journal of Medical Biochemistry, 42(4), 616-620. https://doi.org/10.5937/jomb0-41777