If you agree to participate in the Rare Disease Research Study, your participation includes the use of a 23andMe DNA kit and optional access to the 23andMe Service at no cost. As part of joining this study you will be required to agree to the 23andMe Terms of Service document. We want to make sure you understand that while participating in the study activities described below, the following sections of the Terms of Service will not apply to the extent they prevent you from pursuing a claim if you suffer a research-related injury: Section 4 ("Indemnity") Section 4 ("Disclaimer of Warranties") Section 4 ("Limitation of Liability") Section 5(f) ("Term for Cause of Action") Study activities include: Providing a saliva sample for genetic analysis using a 23andMe DNA kit. Completing a rare disease survey and Health Profile surveys. We may also ask you to complete short follow-up surveys regarding your experience with the disease over time. Please note, however, that if you choose to use any of 23andMe's products, software, services, and website, outside of your participation in these study activities, you will be, just like all users of 23andMe's products, software, services, and website, subject to the 23andMe Terms of Service.