A 60 year old man presents with a chief complaint of a 6 month history of increasing fatigue despite adequate rest and sleep. He denies chest pain or difficulty breathing, and reports he is a non smoker. Concurrent history includes a 25 year history of alcohol used disorder, with daily intake of 5-7, occasionally more, 1.5 oz shots of whiskey, and chronic poor nutrition, reporting, “I eat chips and crackers a lot, I do not have the time to make a meal and I cannot afford to eat out. He ...