Created at	Source	Raw Value	Validated value
April 25, 2021, 12:31 a.m.	usa	inclusion criteria: - 18 to 90 years with confirmed history of covid-19 (positive nasopharyngeal swab for sars-cov-2) - subjective olfactory dysfunction persisting ≥ 90 days after follow-up negative covid-19 nasopharyngeal swab	inclusion criteria: - 18 to 90 years with confirmed history of covid-19 (positive nasopharyngeal swab for sars-cov-2) - subjective olfactory dysfunction persisting ≥ 90 days after follow-up negative covid-19 nasopharyngeal swab
April 23, 2021, 12:31 a.m.	usa	inclusion criteria: 18 to 90 years with confirmed history of covid-19 (positive nasopharyngeal swab for sars-cov-2) and subjective olfactory dysfunction persisting ≥ 90 days after follow-up negative covid-19 nasopharyngeal swab were eligible	inclusion criteria: 18 to 90 years with confirmed history of covid-19 (positive nasopharyngeal swab for sars-cov-2) and subjective olfactory dysfunction persisting ≥ 90 days after follow-up negative covid-19 nasopharyngeal swab were eligible