Al-Timime, N. S., Al-Salihi, A. M., & Hameed, A. A. (2024). Investigating the Optimal Duration of the Sun Exposure for Adequate Cutaneous Synthesis of Vitamin D3 in Baghdad City: Depending on Fitzpatrick Skin Classification for Different Skin Types. Iraqi Journal of Science, 65(1), 546-554. https://doi.org/10.24996/ijs.2024.65.1.42