1. World Health Organization. Constitution of the World Health Organization; 2006. Available from: www.who.int/governance/eb/who_constitution_en.pdf. Accessed October 6, 2022
2. Aging Skin: Histology, Physiology, and Pathology
3. The relationship between skin function, barrier properties, and body-dependent factors
4. Acquired hyperpigmentations
5. Effects of air pollution on the skin: A review. Indian journal of dermatology, venereology and leprology; 2017. Available from: https://ijdvl.com/effects-of-air-pollution-on-The-skin-A-review/. Accessed May 25, 2022.