The practitioners included here have stated that they are familiar with the Guaifenesin Protocol, have requested that they be included in this list, and when listed here either provided this treatment as it is appropriate within the scope of their practices and/or performed FM mapping. This list may change without notice. Practitioners do not often contact us when they change their practices or procedures. Please telephone them to confirm their current practices before making an appointment. Click on your region to access the list of practitioners in your area. As an aid to people searching for a reputable practitioner in their area, we have begun adding the date they were last in contact with us.