Created at	Source	Raw Value	Validated value
Nov. 16, 2021, 6:30 p.m.	usa	inclusion criteria: persons over 20 years of age. active healthcare personnel, who attend patients with covid-19 disease, including all professional categories, medicine, nursing and warders. ability to complete surveys. signature of informed consent	inclusion criteria: persons over 20 years of age. active healthcare personnel, who attend patients with covid-19 disease, including all professional categories, medicine, nursing and warders. ability to complete surveys. signature of informed consent
Oct. 26, 2020, 11:31 p.m.	usa	inclusion criteria: 1. persons over 20 years of age. 2. active healthcare personnel, who attend patients with covid-19 disease, including all professional categories, medicine, nursing and warders. 3. ability to complete surveys. 4. signature of informed consent	inclusion criteria: 1. persons over 20 years of age. 2. active healthcare personnel, who attend patients with covid-19 disease, including all professional categories, medicine, nursing and warders. 3. ability to complete surveys. 4. signature of informed consent