Although they are not providing helminths at this time, they are currently researching the possibility of becoming a provider. Their nascent web page on helminth therapy is here. They hope to run a clinical trial on helminth therapy in the near future.
It would be great to include some short reviews of these providers, and/or, descriptions of their services. If you have used one of the providers above just add your experiences here or if you have an opinion and we'll edit them into plausible reviews. We'll try and avoid overly enthusiastic evaluations in either direction. Helminth therapy is new, all of the providers are doing their best to help people, and the main differences are in service and business philosophy.
This page is just a start and will change as more providers enter the market, and the website fills out.