Response to letter: Device therapy and aldosterone antagonists in the prognosis of heart failure. (15th March 2016) - Behnes, Michael; Bertsch, Thomas; Weiss, Christel; Ahmad-Nejad, Parviz; Akin, Ibrahim; Fastner, Christian; El-Battrawy, Ibrahim; Lang, Siegfried; Neumaier, Michael; Borggrefe, Martin; Hoffmann, Ursula