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(2020). The Role of Health Preconditions on COVID-19 Deaths in Portugal: Evidence from Surveillance Data of the First 20293 Infection Cases. J. Clin. Med., 9.","DOI":"10.3390\/jcm9082368"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Leung, C. (2020). Clinical features of deaths in the novel coronavirus epidemic in China. Rev. Med. Virol., e2103.","DOI":"10.1002\/rmv.2103"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1016\/j.ijsu.2020.02.034","article-title":"World Health Organization declares global emergency: A review of the 2019 novel coronavirus (COVID-19)","volume":"76","author":"Sohrabi","year":"2020","journal-title":"Int. J. Surg."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Wang, D., Hu, B., Hu, C., Zhu, F., Liu, X., Zhang, J., Wang, B., Xiang, H., Cheng, Z., and Xiong, Y. (2020). Clinical characteristics of 138 hospitalized patients with 2019 novel coronavirus-infected pneumonia in Wuhan, China. 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