- High prevalence of small duct primary sclerosing cholangitis among patients with overlapping autoimmune hepatitis and primary sclerosing cholangitis. Olsson, R., Glaumann, H., Almer, S., Broomé, U., Lebrun, B., Bergquist, A., Björnsson, E., Prytz, H., Danielsson, A., Lindgren, S. Eur. J. Intern. Med. (2009)