1769
The present study assessed the combination of radiotherapy ( 60 Gy / 30 fractions / 40 days ) and topotecan ( 0 . 9 mg / m ( 2 ) / day on days 1 - 5 on weeks 1 , 3 and 5 ) in 50 adults with histologically proven and untreated GBM .
 Chemical: topotecan; Disease: GBM
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: topotecan; Disease: GBM