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:A randomized controlled trial of preschool-based joint attention intervention for children with autism.  Deficits in joint attention (JA) and joint engagement (JE) represent a core problem in young children with autism as these affect language and social development. Studies of parent-mediated and specialist-mediated JA-intervention suggest that such intervention may be effective. However, there is little knowledge about the success of the intervention when done in preschools. Assess the effects of a preschool-based JA-intervention. 61 children (48 males) with autistic disorder (29-60 months) were randomized to either 8 weeks of JA-intervention, in addition to their preschool programs (n = 34), or to preschool programs only (n = 27). The intervention was done by preschool teachers with weekly supervision by trained counselors from Child and Adolescent Mental Health Clinics (CAMHC). Changes in JA and JE were measured by blinded independent testers using Early Social Communication Scale (ESCS) and video taped preschool teacher-child and mother-child play at baseline and post-intervention. Clinicaltrials.gov: NCT00378157. Intention-to-treat analysis showed significant difference between the intervention and the control group, with the intervention group yielding more JA initiation during interaction with the preschool teachers. The effect generalized to significantly longer duration of JE with the mothers. This is the first randomized study to show positive and generalized effects of preschool-based JA-intervention. Output:
{'conditions': 'Autism', 'interventions': 'Behavioral: Joint attention intervention'}