- Imerslund-Gräsbeck Syndrome (Selective Vitamin B12 Malabsorption with Proteinuria) - Detailed notes on epidemiology, clinical description, etiology, phenotype-genotype correlations, environmental factors, differential diagnosis, treatment, prognosis and references from the Journal of Rare Diseases.
- Online Mendelian Inheritance in Man - Detailed genetic information on Imerslund-Grasbeck Syndrome.