3662
PATIENTS AND METHODS : Fifty - one assessable patients , 2 to 12 years of age , were treated with oral cis - RA administered in two equally divided doses daily for 2 weeks , followed by a 2 - week rest period , for up to 12 courses .
 Chemical: cis - RA
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: cis - RA