RT Journal Article SR Electronic T1 Vitamin D binding protein in COVID-19 JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP e136 OP e137 DO 10.7861/clinmed.Let.20.5.2 VO 20 IS 5 A1 Marijn M Speeckaert A1 Reinhart Speeckaert A1 Joris R Delanghe YR 2020 UL http://www.rcpjournals.org/content/20/5/e136.2.abstract