Cedeño-Suárez, Lily Margoth, et al. “Value of the Toluidine Blue Test As an Aid to Determine the Biopsy Site in Actinic Prurigo Cheilitis”. Autopsy and Case Reports, vol. 11, Mar. 2021, p. e2021247, https://doi.org/10.4322/acr.2021.247.