Development of a Low-Cost Mask for Prevention of Aerosols Spreading in Endonasal Endoscopic Procedures to the Skull Base during the COVID-19 Pandemic - Ordóñez-Rubiano, Edgar G.; Rueda-Esteban, Roberto J.; Abdalá-Vargas, Nadin J.; Bigio, David; Rentería, Santiago S.; Pinzón-Navarro, Martin (Journal of Neurological Surgery Part B: Skull Base, 2021)