Genetic Diseases, X-Linked

• Children's National Medical Center — Washington D.C., District of Columbia, United States
• Washington University-St. Louis — St Louis, Missouri, United States

• Medical University Vienna, Dep. of Pediatric and Adolescent Medicine — Vienna, Austria

• Vienna, Austria
• Brussels, Belgium
• Brussels, Belgium
• Brussels, Belgium

• University Hospital Maastricht — Maastricht, Limburg, Netherlands

• Covance Clinical Research Unit — Madison, Wisconsin, United States

Not specified

• Hôpital Gabriel Montpied — Clermont-Ferrand, France

• Retina Vitreous Associates — Beverly Hills, California, United States
• The Wilmer Eye Institute at Johns Hopkins — Baltimore, Maryland, United States
• Ophthalmic Consultants of Boston — Boston, Massachusetts, United States
• Retina Associates of Cleveland — Beachwood, Ohio, United States

• Departments of Medicine and Microbiology — Birmingham, Alabama, United States
• National Jewish Medical and Researach Center — Denver, Colorado, United States
• International Center for Interdisciplinary Studies of Immunology — Washington D.C., District of Columbia, United States
• Allergy Associates of the Palm Beaches — North Palm Beach, Florida, United States

• Los Angeles, California, United States
• Aurora, Colorado, United States
• Detroit, Michigan, United States
• New Brunswick, New Jersey, United States