4551
MATERIALS AND METHODS : Patients undergoing treatment with i . v . tobramycin ( 4 mg / kg / day ) were randomised to two groups .
 Chemical: tobramycin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: tobramycin