Jastrząb, B.A. et al. 2021. Pityriasis Lichenoides et Varioliformis Acuta Triggered by Human Papillomavirus Vaccine: A Case Report and Literature Review. Acta Dermato-Venereologica. 101, 9 (Sep. 2021), adv00552. DOI:https://doi.org/10.2340/00015555-3921.