Maternal-infant vitamin D coupling and neonatal hypocalcemia: a six-year cohort integrating preterm risk, onset timing, and pandemic effects.

Hasan Avşar, Ali Bülbül, Evrim Kıray Baş, Hasan Sinan Uslu, Ebru Türkoğlu Ünal, Alper Divarcı, Ahmet Yaşar Tellioğlu, Bülent Güzel, Duygu Besnili Acar, Muammer Kazdal