The Hidden Factor-Low Quality of Data Is a Major Peril in the Identification of Risk Factors for Covid-19 Deaths: A Comment on Nogueira, Pj, Et Al. "The Role of Health Preconditions on Covid-19 Deaths in Portugal: Evidence from Surveillance Data of the First 20293 Infection Cases". J. Clin. Med. 2020, 9, 2368
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P-00S-XHF
P-00S-XHF