TY - CHAP A1 - Tsuprykov, Oleg A1 - Buse, Claudia A1 - Skoblo, Roman A1 - Hocher, Berthold T1 - Free 25 (OH) vitamin D, but not total 25 (OH) vitamin D, is strongly correlated with gestational age and calcium in normal human pregnancy T2 - Journal of bone and mineral research Y1 - 2017 SN - 0884-0431 SN - 1523-4681 VL - 32 SP - S323 EP - S323 PB - Wiley CY - Hoboken ER -