The authors regret an error in the Abstract, and in the Methods section of their article. Please note that albumin levels should be listed as: marked hypoalbuminemia (<2.5 g/dL), mild hypoalbuminemia (2.5-3.5 g/dL), normal albumin (3.5-4.5 g/dL), and hyperalbuminemia (>4.5 g/dL).