Daughter and I both saw a cardiologist recently about OI issues. She's POTsy, I'm more hyperadrenergic POTS. He actually read up on ME after the first visit, and prescribed appropriately for ME patients. It's so weird and wonderful to be taken seriously by a local doctor, that I'm a mix of stunned and thrilled. Three cheers for the Primer, I think it made at least part of the difference in this situation. If you need a cardiologist for autonomic problems and you're in the central Illinois area, I've got a name for you.