1. Mayo Clinic Alix School of Medicine, Scottsdale, AZ (Eells) and Rochester, MN (Oliver), USA;
2. Division of Plastic Surgery, McMaster University, Hamilton, Canada;
3. Plastic and Hand Surgery, The Buncke Clinic, San Francisco, CA, USA;
4. Division of Plastic Surgery and Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Jacksonville, FL, USA