PMC:7696151 / 6602-6797 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T56","span":{"begin":15,"end":92},"obj":"Sentence"},{"id":"T57","span":{"begin":93,"end":177},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" respectively. Our systematic review included 49 preclinical studies and 84 clinical trials. The considered in vivo studies were carried out using allograft or xenograft models. The most importan"}