Natural infection by SARS-CoV-2 in companion animals: a review of case reports and current evidence of their role in the epidemiology of COVID-19 - Morais, Helio Autran de; Santos, Andrea Pires dos; Nascimento, Naíla Cannes do; Kmetiuk, Louise Bach; Barbosa, David Soeiro; Brandão, Paulo Eduardo; Guimarães, Ana Marcia de Sá; Pettan-Brewer, Christina; Biondo, Alexander Welker (Frontiers in Veterinary Science, 2020)