Original publication: Low serum 25‐hydroxyvitamin D (25[OH]D) levels in patients hospitalized with COVID‐19 are associated with greater disease severity. (10th September 2020) - Panagiotou, Grigorios; Tee, Su Ann; Ihsan, Yasir; Athar, Waseem; Marchitelli, Gabriella; Kelly, Donna; Boot, Christopher S.; Stock, Nadia; Macfarlane, James; Martineau, Adrian R.; Burns, Graham P.; Quinton, Richard