16582
METHODS : Women with GDM , who met criteria for insulin treatment , were randomly assigned to metformin ( n = 89 ) or insulin ( n = 91 ) in the Adelaide cohort of the metformin in gestational diabetes ( MiG ) trial .
 Chemical: metformin; Chemical: metformin
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: metformin; Chemical: metformin