Characteristics and outcomes of patients with severe COVID-19 in Indonesia: Lessons from the first wave. - Burhan E; Liu K; Marwali EM; Huth S; Wulung NGHML; Juzar DA; Taufik MA; Wijaya SO; Wati DK; Kusumastuti NP; Yuliarto S; Pratomo BY; et al. (PloS one, 2023)