Rescuers¿ characteristics associated with the correct chest compression during cardiopulmonary resuscitation S. Ballesteros-Peña; G. Vallejo-de la Hoz; I. Fernández-Aedo; A. Etayo-Sancho; L. Berasaluze-Sanz; J. Domínguez-García;

Ultrasound-guided puncture vs conventional technique for arterial blood gas analysis sampling in adults: A systematic review P. Romo-Miguel; S. Ballesteros-Peña;