"id","author_first1","author_last1","title","year","publication","volume","pages","author_first2","author_last2","keyword0","type" "1707","Peter","Underwood","Barriers to health in North Yemen: What is the 'evidence" amd what 'evidence' is wanted?","1990","Health Transition Series (Canbera)","2","602-8","Dennis","Gray","KT","journal"