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Vitamin D Deficiency and Insufficiency in Hospitalized COPD Patients
- Evgeni Mekov,
- Yanina Slavova,
- Adelina Tsakova,
- Marianka Genova,
- Dimitar Kostadinov,
- Delcho Minchev,
- Dora Marinova,
- Maya Tafradjiiska
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- Published: June 5, 2015
- https://doi.org/10.1371/journal.pone.0129080