Vitamin D and COPD: who benefits from supplementation?

Affiliations

• ¹ Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, 1800 Orleans Avenue, Suite 9121, Baltimore, MD 21205, USA; Program in Global Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
• ² Nemours Children's Clinic, Jacksonville, FL, USA.
• ³ Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, 1800 Orleans Avenue, Suite 9121, Baltimore, MD 21205, USA; Program in Global Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA. Electronic address: [email protected].