You will be asked to complete a brief form asking 12 questions on your ability to perform activities of daily living. Examples include; Can you take care of yourself? Can you climb a flight of stairs? You will also be contacted by telephone at 30 days, 6 months, 1 year, and 2 years after your surgery and asked the same 12 questions. If we are unable to reach you by telephone, the questionnaire will be mailed to your home with a return, postage paid envelope included. It should take about 5 minutes to complete. Once you have completed the 2-year questionnaire, your participation in this study will be over.