Once you elect to participate in the registry, you will be directed to register with Genome Medical and schedule a GC appointment. A test will be ordered and a sample collection kit will be mailed to your home. Once the results from your NAT2 test are in you will be provided a results summary with the option to schedule a free Return of Results to address any further questions and/or outline next steps. Participating in this registry does not replace or change your regular medical care.