All participants will undergo the informed consent process. Children over the age of 15 will be asked to document their consent by signing the consent form. Children between the ages of 8 and 15 years of age will be asked to indicate their assent by signing the assent document. Assent will be obtained for children <8 years of age by monitoring visual and vocal indications as well as body language. Parents of all children will be asked to document their consent of the procedure on the consent form.