14231
A total of 207 piperacillin and 204 tazobactam concentration - time data sets from 71 patients were analyzed using a nonlinear mixed - effect modeling approach ( NONMEM VII ) .
 Chemical: piperacillin; Chemical: tazobactam
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: piperacillin; Chemical: tazobactam