Joiner A, Kamara MI, Powell S, Hart L, Sawin G, Glenn M, Vleet LV, Supples M, Chan B, Starks M, Blewer AL. Barriers to bystander interventions in suspected opioid-associated out-of-hospital cardiac arrests: A multiple methods study of 9-1-1 calls. Resuscitation. 2025 Oct; 215:110748.