Al-Timime NS, Al-Salihi AM, Hameed AA. 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 [Internet]. 2024 Jan. 30 [cited 2026 Jul. 11];65(1):546-54. Available from: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/8688