Frequently Asked Questions Below is a list of frequently asked questions that principal investigators and study staff ask. If you have a question that we don't answer here, please contact the PCRO office. Where is the Pediatric Clinical Research Office (PCRO) located? Where can I obtain the required forms to request PCRO Sign-Off and/or request a Scientific Review? If I submit a study for Scientific Review, how long does it take? What are the components of a Scientific Review? What are acceptable methods of peer Scientific Review? What is acceptable evidence of peer Scientific Review? Can the PCRO conduct Scientific Reviews? Do I need Departmental approval for my study prior to submission to the IRB? What is the difference between research, clinical research, departmental research and sponsored research or project? When should a Consent Form, Assent Form or Parental Permission Form be used? How will I know if my study has been scheduled for a Research Quality Assurance and Research Clinical Billing Review? Once the Research Quality Assurance and Research Clinical Billing Review are completed how soon will I know the results? What is the Clinical Trials Registry? Do I need to register my study with Clinicaltrials.gov? How do I register my study with Clinical Trials.gov? What is a minimal and greater than minimal risk study?