Checkpoint inhibitor–induced lichen planus differs from spontaneous lichen planus on the clinical, histological, and gene expression levelCapsule Summary oleh Barbara Meier-Schiesser, MD, PhD, Christine Zecha, MD, Sarah Zierold, MD, Isabel Kolm, MD, Magdalena Röckel, MD, Waltraud Fröhlich, Nora Mittag, MD, Christina Schmitt, MD, Joerg Kumbrink, PhD, Jessica C. Hassel, MD, Carola Berking, MD, Dorothee Nashan, MD, Lars Einar French, MD, Julio Vera-González, PhD, Reinhard Dummer, MD, Katrin Kerl-French, MD, Lucie Heinzerling, MD, MPH