COVID-19 and anxiety, the role of the uncertainty - Iturricastillo Gutierrez, G; Eiros Bachiller, J M; Avalos Perez-Urria, E; Marcos, C; Valenzuela, C; Alonso Perez, T; Giron Moreno, R M; Ancochea Bermudez, J (EUROPEAN RESPIRATORY JOURNAL, 2022)