Tahir, M. et al. 2022. Effect of Topical Liquid Nitrogen on Pain Reduction during Intradermal Platelet-Rich Plasma Therapy Scalp in Androgenic Alopecia. Pakistan Armed Forces Medical Journal. 72, 5 (Nov. 2022), 1831–34. DOI:https://doi.org/10.51253/pafmj.v72i5.7857.