Carbon monoxide poisoning

Prehospital emergency care

Extra-intestinal protozoal diseases

Haemolytic anaemia

Iron deficiency anaemia

HIV infection

Macrocytosis (increased MCV)

Chronic lymphocytic leukaemia (CLL)

Ear wax

Drug poisoning

Acute heat illnesses

An unconscious patient

Myocarditis

Pulmonary hypertension

Bone marrow examination

Thrombocytopenia

Cirrhosis of the liver

Foreign body in the nose

Supraventricular tachycardia (SVT)

Nephrotic syndrome