Hoversten, Patrick, Amrit K Kamboj, Kavel Visrodia, Tsung-Teh Wu, and Jeffrey A Alexander. 2018. “Lichen Planus: A Rare Cause of a Narrowed Esophagus”. Journal of Gastrointestinal and Liver Diseases 27 (2):117-17. https://doi.org/10.15403/jgld.2014.1121.272.lch.