International observational survey of the effectiveness of personal protective equipment during endoscopic procedures performed in patients with COVID-19 / 
Ryota Niikura [and eight others] 
<br/><br/>In: Digestion . 2021 Feb 16;1-9. <br/>doi: 10.1159/000513714. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Personal Protective Equipment<br/>COVID-19<br/>Endoscopy