3830
During the study , vitamin B12 and folate levels were significantly higher in group II patients ; however , no differences in hemoglobin , hematocrit , mean corpuscular volume , and white - cell , neutrophil and platelet counts were observed between groups at 3 , 6 , 9 and 12 months .
 vitamin B12, folate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 vitamin B12, folate