Original article
Evaluating the massive underreporting and undertesting of COVID-19 cases in multiple global epicenters
a Department of Surgery, University of California Irvine, Orange, CA 92868, USA
b Department of Surgery (A), University-Hospital Düsseldorf, Heinrich-Heine University, 40225 Düsseldorf, Germany
c Division of Infectious diseases, University of Warmia and Mazury, 10-561 Olszytn, Poland
d Department of Food Hygiene and Consumer Health Protection, Wroclaw University of Environmental and Life Sciences, 50-375 Wroclaw, Poland
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