Rare and undiagnosed liver diseases: challenges and opportunities.

Competing Interests: Conflicts of Interest: Both authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/tgh-2020-05). The series “Recent Advances in Rare Liver Diseases” was commissioned by the editorial office without any funding or sponsorship. LF and MS served as the unpaid Guest Editors of the series. LF serves as an unpaid editorial board member of Translational Gastroenterology and Hepatology from Sep 2018 to Aug 2020. MS reports personal fees from Bayer, personal fees from ESIAI, personal fees from ENGITIX, outside the submitted work.