Santos, José Manuel, Zélia de Macedo Teixeira, Margarida Soliz, and Maria Manuela Guerra. “Cannabis Use, Risk Grade, and Polydrug Use in Portuguese Adults”. Journal of Nursing Referência 6, no. 1 (September 29, 2022): 1–8. Accessed March 12, 2025. https://revistas.rcaap.pt/referencia/article/view/28678.