Response by Soliman et al to Letter Regarding Article, "Derivation and Validation of a Novel Right-Sided Heart Failure Model After Implantation of Continuous Flow Left Ventricular Assist Devices: The EUROMACS (European Registry for Patients With Mechanical Circulatory Support) Right-Sided Heart Failure Risk Score". Issue 6 (7th August 2018) - Soliman, Osama; Akin, Sakir; Muslem, Rahatullah; Caliskan, Kadir