Enlace original:
https://covid19-evidence.paho.org/handle/20.500.12663/474
Yang J. Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou; The First Clinical Medical School of Lanzhou University, Lanzhou
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[Prevalence of comorbidities in the novel Wuhan coronavirus (COVID-19) infection: a systematic review and meta-analysis]