Vitamin D Deficiency

• Division of Endocrinology, Department of Medicine, Helsinki University Central Hospital — Helsinki, Finland

• Project Office Aga Khan University — Pind Dadan Khan, Punjab Province, Pakistan

• Winthrop University Hospital Dialysis Unit — Mineola, New York, United States
• Winthrop University Hospital — Mineola, New York, United States

• Mary Emily Clinical Nutrition Research Unit — Sainte-Anne-de-Bellevue, Quebec, Canada

• BC Children's Hospital — Vancouver, British Columbia, Canada
• McMaster University — Hamilton, Ontario, Canada

• Medical University Graz — Graz, Austria

• Lokahi Health Center — Kailua-Kona, Hawaii, United States
• Bastyr University — Kenmore, Washington, United States

Not specified

• Department of Dermatology, Lund University Malmoe — Malmö, Sweden

• Baylor College of Medicine — Houston, Texas, United States
• Ben Taub General Hospital — Houston, Texas, United States
• St Lukes Episcopal Hospital — Houston, Texas, United States