https://www.cochrane.org/th/evidence/CD015129_nasal-masks-versus-nasal-prongs-continuous-positive-airway-pressure-preterm-infants
Nasal masks versus nasal prongs for continuous positive airway pressure in preterm infants |...
nasal masks
https://usa.chinadaily.com.cn/china/2014-11/13/content_18909004_4.htm
Anti-smog nasal masks given to children[4]|chinadaily.com.cn
A girl wears a new type of smog-proof nasal mask in a school in Shanghai amid severe smog conditions there on Nov 7.
nasal masksantismoggiven