9180
Using microfluidics - assisted display of DNA for replication track analysis ( ma - RTA ) , we show that WRN and BLM contribute additively to normal replication fork progression , and non - additively , in a RAD51 - dependent pathway , to resumption of replication after arrest by hydroxyurea ( HU ) , a replication - stalling drug .
 Chemical: hydroxyurea
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: hydroxyurea 
Answer:
 Chemical: hydroxyurea