Piñero-Saez S, López-González A, Guisado-Requena I, López-Tendero J, Guerrero-Agenjo C, García-Alcaraz F, Martínez-González-Moro I, Rabanales-Sotos J. Effects of altitude on biceps brachii and erector spinae muscles oxygen saturation during basic cardiopulmonary resuscitation: a simulation study. Front Emerg Med. 2024;.