We just got home from Children's Hospital in Minneapolis. Greta's sweat test is done and now we wait. There is a possibility that we will get the results later this afternoon!
Greta did great. For this test they velcro 2 small electrodes with a gel pad on each forearm. The gel has some kind of chemical that makes the skin sweat. After 5 minutes they took the electrodes off and velcroed 2 small "sweat collectors" on her arms... they looked like watches. I couldn't believe it; Greta let the lab person put them on her and left them alone for the entire 30 minutes.
I'll post again if we get the results.