“…Other frequent symptoms included irritability, from 40 to 100%, poor feeding, from 42 to 81.8%, and tachycardia ranging from 63.6 to 77% [ 12 , 14 , 26 , 41 , 44 – 46 , 51 – 54 , 58 , 60 , 62 – 64 , 67 – 70 ]. In a few cases lethargy was the presenting symptom, with a prevalence between 14% and 51% [ 1 , 12 , 14 , 26 , 60 , 69 ].…”