Pyne, J.H. et al. 2020. Early Squamous Cell Carcinoma With Perineural Invasion: A Prospective Study Examining Anatomic Site, Tumor Surface Diameter, Invasion Depth, and Grade of Differentiation in 1,772 Consecutive Cases. Dermatology Practical & Conceptual. 10, 3 (Jun. 2020), e2020059. DOI:https://doi.org/10.5826/dpc.1003a59.