In medical studies, treatments are tested 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 give information about the participants of the study. You should list the phrases in the same order that they appear in the text, separated by commas. If no information about the participants is mentioned, just output "not found". Relevant information about participants include: gender, medical conditions, location, number of people participating. Do not contain participant mentions without relevant information.
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Question: Forty-nine children with AS were recruited to participate and randomly assigned to intervention ( n = 26 ) or wait-list control ( n = 23 ) conditions .

Answer: not found


Question: This study was conducted to determine the long-term effect of flosequinan , a new orally administered arterial and venous dilator , on the clinical course of patients with moderate to severe congestive heart failure .

Answer: patients with moderate to severe congestive heart failure


Question: In order to investigate the effect of anesthesia on serum parameters , Beluga , Huso huso ( L. ) were blood-sampled immediately without anesthesia ( control ) or subjected to following anesthesia procedure : 40 , 120 , and 240 s exposure to 3,000 , 700 , and 500 mg l⁻¹ clove solution , respectively .

Answer:
not found