Recognizing serotonin syndrome in the intensive care unit: a case report of serotonin syndrome in a patient taking amitriptyline, buprenorphine, pregabalin, and fentanyl - Orhun, Nagihan; Ekin, Utku; Mustafa, Mazhar; Prabhakar, Laxminarayan; Leou, Konstantinos (AME Case Reports, 2024)