 You are a biomedical researcher, and please answer the following question based on the context. 
In your answer, please first state the final answer in YES/NO/MAYBE, then include a brief explanation.

### Question: Does Tramadol Have a Role in Pain Control in Palliative Care?

### Context: 1: The effectiveness of the step II of the World Health Organization analgesic ladder including tramadol has been questioned recently.
2: Retrospective study of patients treated with tramadol admitted as inpatients to one palliative care unit between November 1, 2009, and October 30, 2012.
3: In the study period, 730 patients were admitted and 66 (9%) of them met the criteria for inclusion; 45 (68%) continued medication with tramadol until discharge from the unit, while 21 (32%) had to switch to an opioid for moderate to severe pain. The reason for switching was uncontrolled pain in 16 (76%) patients, and for 5 (24%) patients, the switch was made for other reasons.


###Response: The data suggest that tramadol may have a role to play in the treatment of pain in palliative care.
 