Reply to the Letter to the Editor: How Accurate Are the Surgical Risk Preoperative Assessment System (SURPAS) Universal Calculators in Total Joint Arthroplasty?
1 A W. Trickey, A. H. S. Harris, Stanford-Surgery Policy Improvement Research and Education Center, Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA.
2 A. H. S. Harris, Center for Innovation to Implementation, VA Palo Alto Healthcare System, Palo Alto, CA, USA.