Erratum: Optical properties of organometallic perovskite: An ab initio study using relativistic GW correction and Bethe-Salpeter equationTowfiq Ahmed, C. La-o-vorakiat, T. Salim, Y. M. Lam, Elbert E. M. Chia and Jian-Xin ZhuEPL, 112 2 (2015) 29901DOI: https://doi.org/10.1209/0295-5075/112/29901