INS and eosinophilia-myalgia syndrome: Examples of analyses that may be affected in equine medicine are e.g. adrenocorticotrophic hormone (ACTH) and insulin, used in the diagnosis of the two most common endocrine syndromes: pituitary pars intermedia dysfunction (PPID) and equine metabolic syndrome (EMS) [20], and erythropoietin, used for doping [21].