7893
Two patients who were receiving Tolazoline by infusion developed duodenal ulceration and subsequent intestinal perforation .
 duodenal ulceration, Tolazoline; intestinal perforation, Tolazoline
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:
 duodenal ulceration, Tolazoline; intestinal perforation, Tolazoline