Twelve months before diagnosis of PAI, mild normocytic anaemia was detected; Hb 89 g/L and biochemically confirmed iron deficiency (ferritin 12 μg/L [15–250 μg/L], transferrin saturation 6 % [10-35 %], transferrin 2.79 g/L [2.0-4.0 g/L], with normal B12 and folate levels. Here, TF is linked to nutritional disorder.