Researchers interested in obtaining archived biospecimen samples from Add Health, including urine, blood spots, and saliva DNA, to conduct additional biospecimen analysis must submit an Ancillary Study proposal to the Add Health Principal Investigator for internal and external review. A decision to release archived samples is based on the scientific merit of the proposed project, contribution to Add Health, and quantity of specimen requested. Researchers planning a grant submission to fund Add Health specimen analysis must include documentation of Add Health approval of specimen use in their grant application, and must cover all costs associated with the provision of supplemental data to Add Health. In addition, the investigator must agree to the Add Health dissemination policy of no proprietary period for analysis of new data produced and paid for by the investigator.