Yes, clinical trials are voluntary. You may choose not to enter a clinical trial. You may also choose for your child to be removed from a trial at any time; however, it is important to consider whether your child should begin a clinical trial. A study can be seriously damaged by patients who change their mind in the middle of treatment and decide to have their child removed from the trial.
Your decision about whether to participate in a study will not affect how the healthcare team feels about you or your child. Your child will still receive the same quality of care.