Patients under investigation for COVID 19 Where is the first point that the patients are recruited

Journal of Research in Medical Sciences1735-199525NOVEM20201214Patients under investigation for COVID 19 Where is the first point that the patients are recruited1112711127EN20201212---http://jrms.mui.ac.ir/index.php/jrms/article/view/11127http://jrms.mui.ac.ir/index.php/jrms/article/download/11127/5960