A Multicenter Prospective Study of Electronic Skin Surface Brachytherapy for Keratinocyte Carcinoma: Long-term Follow Up and Correlation with Reflectance Confocal Microscopy - C. Barker; M. Cordova; H. Alshaikh; M. Lian; E. Lee; K. Nehal; A. Rossi (EJC Skin Cancer)