Your goal is to extract structured information from the user's input that matches the form described below. When extracting information please make sure it matches the type information exactly. Do not add any attributes that do not appear in the schema shown below.

```TypeScript

 { // Information on the clinical trial characteristics from the abstract
 conditions: string // The condition or disease being treated in the clinical trial
 drug_or_intervention: string // The drug or intervention used in the clinical trial
}
```


Please output the extracted information in JSON format. Do not output anything except for the extracted information. Do not add any clarifying information. Do not add any fields that are not in the schema. If the text contains attributes that do not appear in the schema, please ignore them. All output must be in JSON format and follow the schema specified above. Wrap the JSON in <json> tags.



Input:The effects of metformin on inflammatory mediators in obese adolescents with insulin resistance: controlled randomized clinical trial.  To compare serum concentrations of inflammatory cytokines, interleukin 6 (IL-6), high-sensitivity C-reactive protein (hs-CRP), adiponectin, and tumor necrosis factor alpha (TNFalpha), before and after 3 months treatment with metformin in obese adolescents with insulin resistance (IR). This was a randomized, double-blinded, clinical trial of two groups of obese adolescents with IR, aged 9-18 years: a placebo group (n=14) and a metformin group (n=12) who received 500 mg metformin every 12 h for 3 months. Anthropometric and biochemical (metabolic and inflammatory cytokines) assessments were compared at the beginning and end of treatment. After 3 months of treatment, body mass index (kg/m2) was reduced in both groups: placebo group (32.82 +/- 6.37-32.10 +/- 6.52; p=0.011) and metformin group (33.44 +/- 5.82-32.71 +/- 5.77; p=0.015). Serum fasting insulin concentrations (pmol/L) increased in the placebo group (189.45 +/- 112.64-266.06 +/- 167.79; p=0.01) and showed a slight decrease in the metformin group (256.82 +/- 113.89-229.25 +/- 86.53; p=0.64). Adiponectin concentrations (microg/mL) decreased in the placebo group (13.17 +/- 7.31-5.65 +/- 6.69; p=0.02), while these remained stable in the metformin group (8.57 +/- 3.98-7.86 +/- 6.23; p=0.64). In the metformin group, significant reductions were found in the variances of serum TNFalpha concentrations (p=0.006; Levene test). These results suggest that treating obese adolescents with IR using metformin for 3 months is an option for patients without response to traditional lifestyle change because metformin improves inflammatory activity, which is an etiological factor in cardiovascular disease development. Output:
{'conditions': 'Obesity', 'interventions': 'Drug: Metformin|Drug: Placebo'}