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Reply to Ialongo et al. Vitamin D, SARS-CoV-2 and Causal Associations in Transversal Studies: The Time-Series Analysis to Reveal Potential Confounders. Comment on "Gaudio et al. Vitamin D Levels Are Reduced at the Time of Hospital Admission in Sicilian SARS-CoV-2-Positive Patients. Int. J. Environ. Res. Public Health 2021, 18, 3491".
Gaudio A, Murabito AR, Agodi A, Montineri A, Castellino P, D O CoV Research. Gaudio A, et al. Among authors: d o cov research. Int J Environ Res Public Health. 2021 Jul 1;18(13):7036. doi: 10.3390/ijerph18137036. Int J Environ Res Public Health. 2021. PMID: 34280973 Free PMC article.