GSTM1 and Schnyder corneal dystrophy: Hb depletion using Ni-NTA beads was only done in the SCD group, as excess plasma Hb was not present in the control group; therefore, our list of brain proteins in plasma from children with SCD may not be exhaustive for proteins involved in the pathophysiology of subclinical brain injury, and ratios of spectral counts after depletion may have been affected by plasma hemoglobin levels.