Abstract: BRIEF INTRODUCTION ON RIA ITEMS IN COMMON USEZhu Guiru(Beijing Friendship Hospital, 100050)ABSTRACTReference values in conventiona1 units or official units for 59 RIA items in common use are 1isted. The clinical significance of each item is defined in a simple and clear way for reference. Key words radioimmunoassay(RIA) reference value conventional units official units clinical significance