Jieying Hu, Zeguang Zheng, Feng Yang, Lihong Zhong, Rongchang Chen, Effect of a Waterproof Device in the Noninvasive Ventilation Circuit on patient-machine Synchronization, Journal of Respiratory Diseases, Volume 1, Issue 1, 2017, Pages 1-7, ISSN 2642-9241, https://doi.org/10.14302/issn.2642-9241.jrd-17-1683. (http://mail.oap-journals.orgjrd/article/599) Keywords: respiration; artificial; ventilator; mechanical; patient-machine synchronization