<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: Additive Effect Of Bacillus Licheniformis (Jungjangsaeng(r)) On Vancomycin Treatment In Patients With C. Difficile Infection:A Multicenter, Randomized Pilot Study[/INST] Yes</s>