6
A study of in vitro reactivity to L - T4 , as assessed by peripheral blood lymphocyte transformation , was carried out in a patient with Hashimoto 's disease who developed leukopenia during treatment with L - T4 .
 adverse effect: leukopenia, L - T4
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: leukopenia, L - T4