A study has created a genome-wide dna methylation map of human neutrophils, revealing widespread inter-individual epigenetic variation. Other research has also explored dna methylation in various contexts, including arabidopsis thaliana, myalgic encephalomyelitis/chronic fatigue syndrome, and multiple sclerosis. The specifics of these studies and their connections to the neutrophil map are unclear, but they all appear to involve epigenetic research.