1. University of California, San Francisco School of Medicine, San Francisco, California, U.S.A.
2. Department of Ophthalmology, University of California, San Francisco School of Medicine, San Francisco, California, U.S.A.
3. Orbit and Oculofacial Plastic Surgery, Department of Ophthalmology, Oregon Health & Sciences University, Portland, Oregon, U.S.A.
4. Orbit and Oculofacial Plastic Surgery, Department of Ophthalmology, University of California, San Francisco, San Francisco, California, U.S.A.
5. F.I. Proctor Foundation, University of California, San Francisco School of Medicine, San Francisco, California, U.S.A.