The median of the ASA-triggered PGD2 ratios (i.e. PGD2 level after incubation with ASA divided by basal PGD2 release) was not elevated in MCAD patients, when compared with healthy individuals (1.10 and 1.10, respectively; P = 1.000), irrespective of MCAD subclass or medication subgroup (for details see Table 2). The gene discussed is PTGDS; the disease is medium chain acyl-CoA dehydrogenase deficiency.