1. Leslie Irvine MD, Inc., Manhattan Beach, California, USA.
2. Division of Head and Neck Surgery, David Geffen School of Medicine at the University of California, Los Angeles, California, USA.
3. Center for Advanced Facial Plastic Surgery, Beverly Hills, California, USA.
4. Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology–Head and Neck Surgery, University of Illinois at Chicago-College of Medicine, Chicago, Illinois, USA.
5. Nassif MD, Inc., and Associates, Beverly Hills, California, USA.
6. Department of Head and Neck Surgery, Keck School of Medicine at the University of Southern California, Los angeles, California, USA.