4537
OBJECTIVE : To determine the risk for new or worsening valvular abnormalities among users of fenfluramine or dexfenfluramine who underwent echocardiography before they began to take these medications .
 Disease: valvular abnormalities; Chemical: fenfluramine; Chemical: dexfenfluramine
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:
 Disease: valvular abnormalities; Chemical: fenfluramine; Chemical: dexfenfluramine