Shakeel Ahmed, Mehwish Khan Abdali, Filza Hafeez, Haafiza Hina Imtiaz, Rabia Ashfaq, Aisha Malik. “Frequency of PPD (Para-Phenylenediamine) Allergy in Hair Dye Users in Faisalabad”. Pakistan Journal of Medical & Health Sciences 16, no. 07 (August 17, 2022): 203. Accessed June 4, 2026. https://pjmhsonline.com/pjmhs/article/view/1950.