17892
The articles cover a wide scope of field areas , including descriptive and metabolic epidemiology , histopathology , lifestyle issues , environment , genetics , biochemistry , molecular biology , microbiology , clinical medicine , intervention trials and public education , basic laboratory studies , and special group studies .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None