Preprocedural ultrasound versus landmark techniques for spinal anesthesia performed by novice residents in elderly: a randomized controlled trial

por Rizk, Marwan S., Zeeni, Carine A., Bouez, Joanna N., Bteich, Nathalie J., Sayyid, Samia K., Alfahel, Waseem S., Siddik-Sayyid, Sahar M.
Publicado 2019