1575
The serum levels of beta - human chorionic gonadotropin ( HCG ) and placental alkaline phosphatase ( PLAP ) were not elevated .
 GENE: beta - human chorionic gonadotropin; GENE: HCG; GENE: placental alkaline phosphatase; GENE: PLAP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: beta - human chorionic gonadotropin; GENE: HCG; GENE: placental alkaline phosphatase; GENE: PLAP