9068
Plasma was tested before and after ( 14 + / - 7 . 5 [ SD ] days ) surgery for IgG antibodies to the complex of heparin / platelet factor 4 , using a standardized , validated enzyme - linked immunosorbent assay ( ELISA ) .
 GENE: IgG antibodies; GENE: heparin / platelet factor 4
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: IgG antibodies, heparin / platelet factor 4 
Answer:
 GENE: IgG antibodies; GENE: heparin / platelet factor 4