Adel, S., T. A. Abd-El-Raheem, G. Ezzat, and N. M. Ismail. “Role of Insulin-Like Growth Factor 1 in Pathogenesis of Acne Vulgaris: Relation to Acne Severity and Body Mass Index”. International Journal of Research in Dermatology, vol. 6, no. 2, Feb. 2020, pp. 147-50, doi:10.18203/issn.2455-4529.IntJResDermatol20200593.