Created at	Source	Raw Value	Validated value
April 6, 2021, 12:31 a.m.	usa	Prevalence of COVID-19;Prevalence of gestational diabetes mellitus;Prevalence of preeclampsia;Prevalence of preterm birth;Serum concentration of 25-hydroxyvitamin D	Prevalence of COVID-19;Prevalence of gestational diabetes mellitus;Prevalence of preeclampsia;Prevalence of preterm birth;Serum concentration of 25-hydroxyvitamin D