25690
In this study , the frequency of thyroid nodules was searched in a population of consecutive patients undergoing routine cervical Doppler evaluation with the use of high - end color Doppler ultrasound units equipped with new technologies that increase nodule conspicuity .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None