Oronasal mask

From: Bachour A, Avellan-Hietanen H, Palotie T, Virkkula P. Practical Aspects of Interface Application in CPAP Treatment. Can Respir J 2019. Available at: https://www.hindawi.com/journals/crj/2019/7215258/. Copyright © 2019 The Authors. Reproduced under the terms of the Creative Commons Attribution License 4.0.