1424
The efficacy and tolerability of VAL / HCTZ combinations were maintained during the extension ( 797 patients ) .
 Chemical: VAL; Chemical: HCTZ
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: VAL; Chemical: HCTZ