The natural history of symptomatic COVID-19 in Catalonia, Spain: a multi-state model including 109,367 outpatient diagnoses, 18,019 hospitalisations, and 5,585 COVID-19 deaths among 5,627,520 people
Burn E., Tebé C., Fernandez-Bertolin S., Aragon M., Recalde M., Roel E., Prats-Uribe A., Prieto-Alhambra D., Duarte-Salles T.