PMC:7143804 / 3647-3741 JSONTXT

{"project":"2_test","denotations":[{"id":"32106462-24030680-69893274","span":{"begin":72,"end":74},"obj":"24030680"},{"id":"32106462-19327449-69893275","span":{"begin":81,"end":83},"obj":"19327449"},{"id":"32106462-21387067-69893276","span":{"begin":87,"end":89},"obj":"21387067"},{"id":"32106462-17553097-69893277","span":{"begin":90,"end":92},"obj":"17553097"}],"text":"s in-depth. There are several good review papers written on this topic [12,13,14,15,16,17,18,1"}