Hello-My name Leonard, 74 year old and have COPD. I had to move from Mexico City to the sea shore. O2 density is higher on the sea shore. I am on O2 compressed 24/7. I cannot work nor care for myself. I am a potential candidate for Spiration endobronchial valve implants. Have you or any member of your family received coil valve implants? What is or was your/their experience?