The probability to detect cocaine, methylecgonine, cinnamoylcocaine, hygrine and cuscohygrine in urine samples of coca leaves chewers after six years

1. Rubio, N.C.
2. Moreda-Piñeiro, A.
3. Álvarez-Freire, I.
4. Bermejo-Barrera, P.
5. Tabernero-Duque, M.J.
6. Bermejo, A.M.