Respiratory Protection Effect of Ear-loop-type KF94 Masks according to the Wearing Method in COVID-19 Pandemic: a Randomized, Open-label Study.
Hyun Jun YangHee YoonSoo Yeon KangGun-Tak LeeJong Eun ParkTae Rim KimSe Uk LeeSung Yeon HwangWon Chul ChaTae-Gun ShinIk Joon JoPublished in: Journal of Korean medical science (2021)
ClinicalTrials.gov Identifier: NCT04794556.