Stability of organic solar cells with PCDTBT donor polymer: An interlaboratory study – ERRATUM. Issue 16 (13th August 2018) - Ciammaruchi, Laura; Oliveira, Ricardo; Charas, Ana; Tulus,; von Hauff, Elizabeth; Polino, Giuseppina; Brunetti, Francesca; Hansson, Rickard; Moons, Ellen; Krassas, Miron; Kakavelakis, George; Kymakis, Emmanuel; et al.