Cite
APA Citation
Langel, K., Gjerde, H., Favretto, D., Lillsunde, P., Øiestad, E. L., Ferrara, S. D., & Verstraete, A. G. (n.d.). comparison of drug concentrations between whole blood and oral fluid. Drug testing and analysis, 6(5), 461–471. http://access.bl.uk/ark:/81055/vdc_100025083333.0x000005