1. Division of Facial Plastic and Reconstructive Surgery, University of California San Francisco, San Francisco, California, USA.
2. School of Medicine, University of California San Francisco, San Francisco, California, USA.
3. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California.
4. Department of Surgery, Division of Trauma and Surgical Critical Care, Zuckerberg San Francisco General Hospital and Trauma Center, San Francisco, CA, University of California San Francisco, San Francisco, California, USA.