Source google image: https://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12890-018-0708-3/MediaObjects/12890_2018_708_Fig1_HTML.png
Isolation 3 mrgn
Source google image: https://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12890-018-0708-3/MediaObjects/12890_2018_708_Fig1_HTML.png