4009
The average birth mass of these newborns was 3491 . 9 + / - 2 SD 780 . 5 g and that in the control group 3 , 767 . 5 + / - 2 SD 824 . 2 g ( P less than 0 . 05 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None