2001
The aim of this study is to investigate the effects of the sonographic characteristics of the nodule , demographic features of patient , and nodule size and needle size used for sampling , on obtaining adequate cytological material ( CM ) in thyroid fine - needle aspiration biopsy ( FNAB ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None