Nimotuzumab (Experimental group): Nimotuzumab will be presented in bulbs of 50 mg / 10 mL, boxes of 4 bulbs. Up to three doses of Nimotuzumab will be administered by intravenous route (antecubital vein), the first two mandatory and, the third if there is no clinical improvement. First dose: 200 mg of Nimotuzumab diluted in 250 mL of 0.9% saline solution, (total volume of 290 mL), in a 2-hour infusion. Second dose: 100 mg of Nimotuzumab diluted in 250 mL of 0.9% saline solution, (total volume of 270 ml), in a 2-hour infusion. The second dose will be administered 72 hours after the first infusion. If the patient is still hospitalized in the Intensive Care Unit (ICU) and, shows signs of progressive disease, a third dose may be administered 72 hours after the second dose. The preparation of the infusion will be carried out in the same way as in the second administration.