5060
Rapid enzyme analysis of amniotic fluid phospholipids containing choline : a comparison with the lecithin to sphingomyelin ratio in prenatal assessment of fetal lung maturity .
 amniotic fluid, fetal lung
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 amniotic fluid, fetal lung