NAIROBI – A man has died outside an emergency ward of Kenya's largest referral hospital after he was not treated for hours by striking staff, a witness said.Pay raises for Kenyatta National Hospital workers were approved by the government in 2012 but the workers say they have not received the increases.Evans Nyabuto, a motorcycle taxi driver in Nairobi's Kawangware area, was not feeling well Sunday evening and by Monday morning he was vomiting blood, said colleague Christopher Muvya.Local clinics referred Nyabuto to the hospital but when he arrived no one attended to him for more than two hours and those they approached turned them away, said Muvya.“A worker told me they are on strike so there will be no help from them.