This is the existing advice to doctors for tests for the diagnosis of ME/CFS from a New Zealand health board: 1. Laboratory tests should be limited and dependent on the history and examination.1 Only repeat bloods if there is a good clinical indication. Consider these blood tests · CBC, CRP, ferritin · Electrolytes, renal and liver function, calcium, magnesium, blood glucose · Thyroid function · Coeliac antibodies · Other tests only if clinically indicated: · If associated with a viral illness, consider Epstein-Barr virus, cytomegalovirus, HIV testing. Lyme disease does not exist in New Zealand and should not be routinely tested for. · Immunoglobulins, antinuclear antibodies, rheumatoid titres, creatinine kinase, and cortisol should not be routinely checked.What do you think? Are there any important tests missing? What tests should be repeated annually?