Corrigendum: Reply To: How Does Substitutional Doping Affect Visible Light Absorption in a Series of Homodisperse Ti11 Polyoxotitanate Nanoparticles—A Comment on the Band Gap Determination of the FeII Cages. Issue 20 (25th April 2016) - Chen, Yang; Jarzembska, Katarzyna N.; Trzop, Elzbieta; Coppens, Philip