Teacher:Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
Teacher: Now, understand the problem? Solve this instance: Question: Does preoperative infliximab therapy increase morbidity and mortality after laparoscopic resection for inflammatory bowel disease?
Answer: This study is subject to the limitations of a retrospective design.
Student:
no