12653
Recent studies have shown that under experimental conditions ferrous sulfate may reduce the gastrointestinal absorption of orally administered levothyroxine sodium in patients with primary hypothyroidism .
 adverse effect: reduce the gastrointestinal absorption of orally administered levothyroxine sodium, ferrous sulfate
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  reduce the gastrointestinal absorption of orally administered levothyroxine sodium, ferrous sulfate 
Answer:
 adverse effect: reduce the gastrointestinal absorption of orally administered levothyroxine sodium, ferrous sulfate