Opioid Use and Gut Dysbiosis in Cancer Pain Patients. - Coluzzi, Flaminia; Scerpa, Maria Sole; Loffredo, Chiara; Borro, Marina; Pergolizzi, Joseph V.; LeQuang, Jo Ann; Alessandri, Elisa; Simmaco, Maurizio; Rocco, Monica (International Journal of Molecular Sciences, 2024)