<s>[INST] Given an abstract text, please determine whether it contains any drug mentions. Provide a 'Yes' or 'No' answer based on the presence or absence of drugs. Abstract Text: Defective Stat3 Signaling In Treatment-Refractory Very Early Onset Inflammatory Bowel Disease Is Associated With A Transcriptional Signature Which Predicts Response To Ustekinumab[/INST] Yes</s>