1. Department of Natural Products and Alternative Medicine, College of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia;
2. Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia;
3. Department of Pharmacognosy, Faculty of Pharmacy, Sana’a University, Sana’a, Yemen;
4. Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia;
5. Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia;
6. Vitiligo Research Chair, College of Medicine, King Saud University, Riyadh, Saudi Arabia