4536
BACKGROUND : Because uncontrolled echocardiographic surveys suggested that up to 30 % to 38 % of users of fenfluramine and dexfenfluramine had valvular disease , these drugs were withdrawn from the market .
 Chemical: fenfluramine; Chemical: dexfenfluramine; Disease: valvular disease
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: fenfluramine; Chemical: dexfenfluramine; Disease: valvular disease