Comparison of low-cost interventions for pain during radial arterial blood gas sampling in the emergency department: a three-arm randomised controlled trial. Emergency Care Journal, [S. l.], 2026. DOI: 10.4081/ecj.2026.14680. Disponível em: https://www.pagepressjournals.org/ecj/article/view/14680. Acesso em: 25 may. 2026.