1. Niemann-Pick Disease, Type A. (OMIM). Johns Hopkins University School of Medicine;1986. Updated February 26, 2021. Accessed February 1, 2022. http://www.ncbi.nlm.nih.gov/omim.
2. Niemann-Pick Disease, Type B. (OMIM). Johns Hopkins University School of Medicine;2003. Updated January 20, 2022. Accessed February 1, 2022. http://www.ncbi.nlm.nih.gov/omim.
3. Niemann-Pick Disease, Type C1; NPC1. (OMIM). Johns Hopkins University School of Medicine;1986. Updated May 26, 2020. Accessed February 1, 2022. http://www.ncbi.nlm.nih.gov/omim.
4. Niemann-Pick Disease (OMIM). Johns Hopkins University School of Medicine;2003. Updated October 19, 2016. Accessed February 1, 2022. http://www.ncbi.nlm.nih.gov/omim.