Changes in the pulmonary surfactant in patients with mild to moderate COVID-19 - Spela Kokelj; Per Larsson; Emilia Viklund; Hatice Koca; Hanna Slogén; Lowie Vanfleteren; Bo Nilsson; Karin Fromell; Johan Westin; Anna-Carin Olin (PLoS ONE, 2025)