CRP and vitamin B12 deficiency: Blood tests found microcytic anemia (Hemoglobin (Hb): 9 g/dL, mean corpuscular volume of 80 fl) with both iron and vitamin B12 deficiency (ferritin: 12 μg/L, B12 93 pmol/L (138–652 pmol/L)) and elevated levels of acute phase reactants (i.e., C-reactive protein (CRP): 45 mg/L).