ADRB2 and myalgic encephalomeyelitis/chronic fatigue syndrome: Given our results and the existence of discrepant reports of elevated and lower levels of ADRB2 AAb levels, as addressed in the previous paragraph, the success of IA in responding ME/CFS subjects could be attributed to other AAb that are not yet identified or through the clearance of IgG with inflammatory glycan patterns, for example, afucosylated IgG.