[1] Dept Vet Affairs New Jersey Healthcare Syst, Dept Surg, E Orange, NJ 07018 USA
[2] Walter Reed Army Med Ctr, Dept Med, Washington, DC 20307 USA
[3] Philadelphia Coll Osteopath Med, Philadelphia, PA 19131 USA
[4] Walter Reed Army Med Ctr, Dept Surg, Washington, DC 20307 USA