Q. A 56-year-old woman presents to her primary care physician with a 6-week history of cough, dyspnea with exertion, and unintentional weight loss. She is a nonsmoker and has no history of alcohol consumption or significant family history of lung disease. Her vital signs are: temperature 98.6°F (37°C), blood pressure 125/80 mmHg, heart rate 85 beats/min, respiratory rate 18 breaths/min, and oxygen saturation 95% on room air. Physical examination is unremarkable, with no adventitious sounds on lung auscultation. Chest imaging shows multiple peripheral ground-glass opacities. Pulmonary function tests reveal a restrictive pattern with an associated gas transfer defect. What is the most likely diagnosis?