aDepartment of Orthopaedic Surgery, Thomas Jefferson University Hospital, Philadelphia, PA

bRothman Orthopaedic Institute, Thomas Jefferson University, Philadelphia, PA

Financial Disclosure: The authors report no conflicts of interest.

Each author contributed in part to writing and editing the manuscript. The authors have no financial disclosures relevant to this study. The authors received no funding support for this study. This study did not require approval by an institutional review board.

Correspondence to Gabriel I. Onor Jr, MD, 925 Chestnut St. 5th Floor, Philadelphia, PA 19107 Tel: 504-952-5517; Fax: 267-479-1379; e-mail: [email protected]