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Akbar, S., Siddiqui, Z.K., Diwan, R.A. and Rehm, M.H. 2021. Demographic profile and clinical picture of patients presented with Paraphenylene Diamine (PPD)/ Kala Pathar poisoning at a District Teaching Hospital. Pakistan Journal of Medical Sciences. 37, 5 (Jul. 2021). DOI:https://doi.org/10.12669/pjms.37.5.4251.