A study protocol for a European, mixed methods, prospective, cohort study of the effectiveness of naloxone administration by community members, in reversing opioid overdose: NalPOR... oleh Nicola Metrebian, Ben Carter, Desiree Eide, Rebecca McDonald, Joanne Neale, Stephen Parkin, Teodora Dascal, Clare Mackie, Ed Day, Joar Guterstam, Kirsten Horsburgh, Martin Kåberg, Mike Kelleher, Josie Smith, Henrik Thiesen, John Strang