Measurement of the Maternal Serum 25 - Hydroxyvitamin D, Neutrophil - to - Lymphocyte Ratio and Paraoxonase 1 Levels in the Prediction of Spontaneous Preterm Birth. Journal of Pharmaceutical Negative Results, [S. l.], p. 651–656, 2022. DOI: 10.47750/pnr.2022.13.S03.099. Disponível em: https://pnrjournal.com/index.php/home/article/view/651.. Acesso em: 5 jun. 2026.