PMC:7031771 / 6921-7168 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T29","span":{"begin":0,"end":15},"obj":"Sentence"},{"id":"T30","span":{"begin":16,"end":167},"obj":"Sentence"},{"id":"T31","span":{"begin":169,"end":188},"obj":"Sentence"},{"id":"T32","span":{"begin":189,"end":247},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Acknowledgments\nThe authors thank Keyi Yin, Wei Zhuang, Yiahua Zi, Yao Tong for their technical assistance in compiling and verifying the data provided in the article.\n\nCompeting interests\nThe authors declare that they have no competing interests."}