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COVID-19 Population Survey of Iran (COPSIR) study protocol:..:

Janani, L ; Hajebi, A ; Nazari, H...
http://eprints.iums.ac.ir/34956/1/COVID-19%20Population%20Survey%20of%20Iran%20%28COPSIR%29%20study%20protocol%20Repeated%20survey%20on%20knowledge,%20risk%20perception,%20preventive%20behaviors,%20psychological%20problems,%20essential%20needs,%20and%20public%20trust%20during%20COVID-19%20epidemic.pdf.  , 2020