5255
To further our knowledge about the systemic humoral immune system response to weak hapten - syngeneic or allogeneic protein conjugates ( corrosion and wear products of metallic orthopedic devices ) , a sensitive enzyme - linked immunosorbent assay ( ELISA ) method for testing for antibody ( humoral immunity ) to metals was developed .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None