Dear Merry, I wish I could answer your question clearly and with accuracy but many of the doctors either will not answer the question or not with a complete answer. One says one thing the other says another, I think they think we are of a low I.. Q , or they mumble, etc,, etc. I keep anmswering. The latet: BELEVE IT OT NOT; WENT TO LUNG DOCTOR AFTER BEING IN EMERGENEY ROOM FOR CHEST OAINS IN AREAS OF THE NODULES AND THE LUNG DOCTOR TOLD ME THE CAT SCAN SHOWED NO NODULES.