I am a retired nurse. When I started having problems with my breathing, I was diagnosed with COPD and when my voice went doctors were mystified. I was sent to doctor after doctor with no answers and no help. What a relief to finally be sent to Southwestern Medical Center in Dallas and to finally be given a diagnosis and some answers. For everyone out there who is frustrated and despairing of finding out what is wrong don't give up and don't let your doctors give up searching for your answers either.