| http://www.w3.org/ns/prov#value | - The contributors were informed of the nature of the study and informed consent was obtained.Exclusion criteriaPatients were excluded if there was evidence of drug or alcohol abuse defined as any use of reactional drugs or more than two drinks per day; presence of congestive heart failure (ejection fraction < 35% on a echocardiogram or signs such as edema, dyspnea, or jugular venous distension); se
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