Visit 1: Screening Visit Visit 2: Day 0 (surgery) Visit 3: Week 2 (+/- 2 days) Visit 4: Week 4 (1 month) Visit 5: Week 8 (2 months) Visit 6: Week 12 (3 months) Visit 7: Week 16 (4 months) Visit 8: Week 20 (5 months) Visit 9: Week 24 (6 months) Visit 10: Week 30 Visit 11: Week 36 Visit 12: Week 42 Visit 13: Week 48