3908
The former patient had complained once that his visual acuity had decreased after the termination of IFN therapy , and the latter patient complained twice during IFN therapy that his visual acuity had decreased .
 visual acuity had decreased, IFN; visual acuity had decreased, IFN
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 visual acuity had decreased, IFN; visual acuity had decreased, IFN