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Fig. 1 | Trials

Fig. 1

From: Effect of vitamin D supplementation versus placebo on recovery delay among COVID-19 Tunisian patients: a randomized-controlled clinical trial

Fig. 1

Study protocol flow diagram. Patients with a positive RT-PCR test at 14 days in the containment center were eligible to be included in the present study. The RT-PCR control test was weekly if it remained positive. The maximum period of staying in the center was 3 months. The phone follow-up was done at 1 year and asking about persistent COVID-19 symptoms and a possible second COVID-19 infection after the first episode. RT-PCR, reverse transcription-polymerase chain reaction

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