Distinct effects of cocaine and cocaine plus cannabis on neurocognitive functioning and abstinence: A six-month follow-up study - Oliveira Junior, Hercilio Pereira de; Goncalves, Priscila di; Ometto, Mariella; Santos, Bernardo dos; Malbergier, Andre; Amaral, Ricardo; Nicastri, Sergio; Andrade, Arthur Guerra de; Cunha, Paulo Jannuzzi (Drug and alcohol dependence, 2019)