A 50-year-old woman arrives at the emergency room feeling unwell. she has no particular history but describes fatigue that quickly appeared. the clinical examination is normal apart from a conjunctival subcutaneous tissue. the blood count shows hemoglobin 90 g/l, red blood cells 2.7 t/l, hematocrit 27%, vgm 102 fl, ccmh 33 g/dl, leukocytes 8 g/l, polynuclear neutrophils 5 g/l, lymphocytes 2.3 g/l , monocytes 0.7 g/l. Which biological tests do you think are relevant to prescribe as first intention? (one or more possible answers)
C-reactive protein (crp)
Serum iron
Serum protein electrophoresis
Reticulocytes
Ldh