9617
Specimens were assayed for alpha - fetoprotein , unconjugated estriol , free alpha hCG , and total hCG .
 alpha - fetoprotein, alpha hCG, hCG
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 alpha - fetoprotein, alpha hCG, hCG