GSTM1 and Schnyder corneal dystrophy: Much like variants in BCL11A, MYB and KLF-1 have been shown to be associated to Hb F levels in both HU-exposed and HU-naïve conditions [6, 12], in the present study, we have investigated the relationship between the four SAR1a promoter variants and baseline HbF in SCD patients from Cameroon, without any HU treatment.