"Pernicious anaemia is the commonest cause of hypovitaminosis B12 globally. Its prevalence in the US has been determined as ~150/100,000."
"Historically the Schilling test was employed, however this is no longer available."
Expected headings
"Diagnosis"
"Associations"
"History and etymology"
"Thomas Addison first detailed this condition in 1849, described as a clinical presentation of pallor, asthenia and insidious and relentless deterioration of one's health. Initially it was known as Addison's anaemia. Later it was given its monicker due to its universally inexorable fatal prognosis."