A 62-year old coal miner presents to clinic for progressive shortness of breath for several weeks. He denies any past medical history and denies smoking or drugs. He has noted increasing dyspnea on exertion. Lungs demonstrate fine dry crackles, heart sounds are normal, there is no jugular venous distinction, and bilateral lower extremities are normal. BP 141/85 P 97 RR 20 O2sat 92% room air. Chest xray demonstrates diffuse interstitial infiltrates and honeycombing. What interventions will most likely alleviate this patient's symptoms?