TASK DEFINITION: In medical studies, the efficacy of medical treatments (called interventions) is evaluated within a group of study participants. You will be given a sentence of a study report in which your task is to list the phrases that describe the intervention(s) of the study. You should list the phrase in the same order that they appear in the text, separated by commas. If no information about the interventions is mentioned, just answer with "not found". Interventions are: a specific drug, surgery, talking therapy, a lifestyle modification, control or placebo treatment. Do not include details, dosages, frequency and duration, intervention mentions that are not in an informative span of text.
PROBLEM: Forty-nine children with AS were recruited to participate and randomly assigned to intervention ( n = 26 ) or wait-list control ( n = 23 ) conditions .

SOLUTION: wait-list control

PROBLEM: Participating physicians were randomized to either the demonstration or the control arm , and patients were assigned to a study arm based on the randomization of their physicians .

SOLUTION: not found

PROBLEM: Assessments of JA skills , SP skills , mother-child interactions , and language development were collected at 4 time points : pre- and postintervention and 6 and 12 months postintervention by independent testers .

SOLUTION:
not found

