The role of functional vitamin D deficiency and low vitamin D reservoirs in relation to cardiovascular health and mortality - Herrmann, Markus; Keppel, Martin H; Zelzer, Sieglinde; Alonso, Nerea; Cavalier, Etienne; Kleber, Marcus; Enko, Dietmar; Scharnagl, Hubert; Pilz, Stefan; März, Winfried (Clinical Chemistry and Laboratory Medicine (CCLM), 2024)