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  2. Movahed MR, Talle A, Hashemzadeh M. In Patients with Cardiogenic, Shock Intra-Aortic Balloon Pump is Associated with the Lowest Whereas Impella with the Highest Mortality Regardless of Severity or Hospital Types Using the Large Nationwide Inpatient Sample (NIS). https://ssrn.com/abstract=4517178 or http://dx.doi.org/10.2139/ssrn.4517178
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