Barb: My father and I would like to know more about the bovine collagen injection that you had. How have you been since you had it? Dad has found a Dr. Burke and a Dr. Burns at Cleveland Clinic who are also doing the injection. We noticed that his voice problem started a few years ago immediately after he had double bypass heart surgery. He and Mom seem to think that the vocal cords may be stretched. Any info. You could pass along to me will then be passed along to him. Thanks! Trish