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Keyword
- 25(OH)D1
- 25-hydroxyvitamin D 1
- COPD1
- FEV1/FVC ratio1
- Forced Expiratory Volume in the 1st second over the Forced Vital Capacity 1
- Health Disparities1
- NHANES1
- National Health and Nutrition Examination Survey 1
- Obstructive Lung Disease1
- Oncology1
- Pediatric 1
- mechanical ventilation1
- patient and caregiver distress1
- pediatric oncology1
- pediatric palliative care1
- respiratory failure1
- spirometry 1
- tracheostomy1
- vitamin D1