8648
OBJECTIVE : To describe a case of cefazolin - induced leukopenia in a critically ill patient who developed this adverse reaction upon rechallenge with cefoxitin .
 adverse effect: leukopenia, cefazolin
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, cefazolin