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Costa-Santos C, Ribeiro-Vaz I, Monteiro-Soares M. 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, P.J., 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 . Journal of Clinical Medicine. 2020; 9(11):3442. https://doi.org/10.3390/jcm9113442

Costa-Santos, Cristina, Inês Ribeiro-Vaz, and Matilde Monteiro-Soares. 2020. "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, P.J., 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 " Journal of Clinical Medicine 9, no. 11: 3442. https://doi.org/10.3390/jcm9113442

Costa-Santos, C., Ribeiro-Vaz, I., & Monteiro-Soares, M. (2020). 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, P.J., 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 . Journal of Clinical Medicine, 9(11), 3442. https://doi.org/10.3390/jcm9113442