TY - JOUR T1 - The Effect of Vitamin D Levels on the Frequency of Upper Respiratory Tract Infection in Children AU - Boğa, Aysun AU - Şahin, Ebru AU - Karacı, Mehmet AU - Yanar Ayanoğlu, Çiğdem AU - Kaya, Yusuf AU - Dağ, Yasin Y1 - 2022 PY - 2022 DA - 2022 N1 - doi: 10.14744/hnhj.2019.16769 DO - 10.14744/hnhj.2019.16769 T2 - HAYDARPAŞA NUMUNE MEDICAL JOURNAL JF - HAYDARPAŞA NUMUNE MEDICAL JOURNAL JO - Haydarpasa Numune Med J SP - 93 EP - 96 VL - 62 IS - 1 SN - M3 - doi: 10.14744/hnhj.2019.16769 UR - https://dx.doi.org/10.14744/hnhj.2019.16769 Y2 - 2022 ER -