Farhoudian, A., Radfar, S., Mohaddes Ardabili, H., Rafei, P., Ebrahimi, M., Khojasteh Zonoozi, A., de Jong, C., Vahidi, M., Yunesian, M., Kouimtsidis, C., Arunogiri, S., Hansen, H., Brady, K., (ISAM-GSC), I., Potenza, M., Baldacchino, A. & Ekhtiari, H. 2021, 'A global survey on changes in the supply, price, and use of illicit drugs and alcohol, and related complications during the 2020 COVID-19 pandemic', Frontiers in Psychiatry, 12, article no: 646206. https://doi.org/10.3389/fpsyt.2021.646206