PMC:7229913 / 5588-5907 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T47","span":{"begin":0,"end":218},"obj":"Sentence"},{"id":"T48","span":{"begin":219,"end":319},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"In addition, the Gridded Population of the World from 1980 to 2010 was developed by the Center for Global Environmental Research at the National Institute for Environmental Studies, Japan (Murakami and Yamagata, 2019). We calculated zonal means of gridded populations to show the locations with high population density."}