Ismael Blanco, 6, a neurological patient being treated with anticonvulsants, sucks his thumb while he sleeps during an electroencephalogram in a clinic in La Guaira, Venezuela February 4, 2017. REUTERS/Carlos Garcia Rawlins SEARCH "EPILEPSY CARACAS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY