The effect of iron deficiency on cardiac resynchronization therapy: results from the RIDE‐CRT Study oleh Philipp Lacour, Phi Long Dang, Daniel Armando Morris, Abdul Shokor Parwani, Wolfram Doehner, Franziska Schuessler, Felix Hohendanner, Frank R. Heinzel, Andrea Stroux, Carsten Tschoepe, Wilhelm Haverkamp, Leif‐Hendrik Boldt, Burkert Pieske, Florian Blaschke