G6PD and G6PD deficiency: However, haemolytic anaemia risk is relevant mainly for a subset of the population, G6PD-deficient individuals,60 and the lack of NF studies that specifically included G6PD-deficient patients in the literature as well as most reports available being from populations with low prevalence of G6PD deficiency made it impossible to calculate the incidence and estimate the risk of haemolytic anaemia events in this population.