Cytokines interferon−γ− inducible protein 10 and granulocyte−macrophage colony−stimulating factor are associated with psychiatric symptoms in opioid−dependent patients: A cross− sectional study - Kristin Nygård−Odeh; Hedda Soløy−Nilsen; Magnhild Gangsøy−Kristiansen; Ole Lars Brekke; Tom Eirik Mollnes; Michael Berk (PLoS ONE, 2025)