Classifying COVID-19 hospitalizations in epidemiology cohort studies: The C4R study - Elizabeth C. Oelsner; Akshaya Krishnaswamy; Rafail Rustamov; Pallavi P. Balte; Tauqeer Ali; Norrina B. Allen; Howard F. Andrews; Pramod Anugu; Alexander Arynchyn; Lori A. Bateman; Jianwen Cai; Harry Chang; et al. (PLoS ONE, 2025)