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| Trial name or title | LungVITamin D and OmegA‐3 Trial |
| Methods | Double‐blind, placebo‐controlled RCT |
| Participants | Adults aged 50 years or older |
| Interventions | 2000 IU vitamin D3 orally daily (factorial design with marine omega‐3 fatty acids) |
| Outcomes | Asthma exacerbations and symptoms in subgroup |
| Starting date | July 2010 |
| Contact information | Prof Diane Gold, Brigham and Women's Hospital, Boston, USA |
| Notes |
