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Mazzitelli et al., Travel Medicine and Infectious Disease, 37, doi:10.1016/j.tmaid.2020.101826 (Letter) (not included in the study count)
Apparent inefficacy of hydroxychloroquine combined with azithromycin on SARS-CoV-2 clearance in an incident cohort of geriatric patients with COVID-19
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Report on HCQ+AZ use in 41 elderly high-risk patients. 29 of 30 patients with treatment >= 5 days survived. Only 10% were PCR negative after one week, however the Ct value is not specified.

Mazzitelli et al., 7/31/2020, preprint, 8 authors.
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