Today we have Dr. Antonia Chen with us talking about "patient optimization" or how to improve your surgical outcomes.Dr Chen is an orthopedic surgeon, specializing in hip and knee replacement.She is an Associate Professor and Director of Arthroplasty Research at Brigham & Women’s Hospital and Harvard Medical School.According to Dr. Chen, here are the main things she looks at before the surgery:* Diabetes * Obesity * Malnutrition * Patient Intervention * Vitamin D