1. College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, California, USA.
2. Department of Dermatology, University of California, Davis, Sacramento, California, USA.
3. Des Moines University College of Osteopathic Medicine, Des Moines, Iowa, USA.
4. Department of Ophthalmology & Vision Science, University of California, Davis, Sacramento, California, USA.