Let not your prophets and your diviners, that be in the midst of you, deceive you, neither hearken to your dreams which ye cause to be dreamed.

Correction for 'Photon upconversion: from two-photon absorption (TPA) to triplet-triplet annihilation (TTA)' by Changqing Ye et al., Phys. Chem. Chem. Phys., 2016, DOI: .