PMC:7088323 / 20219-21097 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T229","span":{"begin":247,"end":250},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"}],"text":"Publisher’s note\nSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.\nZheng Ye and Yun Zhang contributed equally to this work.\n\nFunding information\nThe authors state that this work has not received any funding.\n\nCompliance with ethical standards\n\nGuarantor\nThe scientific guarantor of this publication is Bin Song.\n\nConflict of interest\nThe authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.\n\nStatistics and biometry\nNo complex statistical methods were necessary for this paper.\n\nInformed consent\nWritten informed consent was waived by the Institutional Review Board.\n\nEthical approval\nInstitutional Review Board approval was obtained.\n\nMethodology\n• retrospective\n• observational\n• performed at one institution"}

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