1. Department of Pediatrics; The University of Iowa; Iowa City IA USA
2. Department of Orthodontics-Dows Institute; The University of Iowa; Iowa City IA USA
3. Center for Craniofacial and Dental Genetics; University of Pittsburgh; Pittsburgh PA USA
4. Department of Oral Biology, School of Dental Medicine; University of Pittsburgh; Pittsburgh PA USA
5. Department of Human Genetics, Graduate School of Public Health; University of Pittsburgh; Pittsburgh PA USA
6. Clinical and Translational Science Institute; University of Pittsburgh; Pittsburgh PA USA
7. Department of Psychiatry, School of Medicine; University of Pittsburgh; Pittsburgh PA USA
8. National Bureau of Economic Research; Cambridge MA USA
9. Department of Health Management and Policy; The University of Iowa; Iowa City IA USA
10. Department of Economics; The University of Iowa; Iowa City IA USA
11. Department of Preventive and Community Dentistry; The University of Iowa; Iowa City IA USA
12. Public Policy Center; The University of Iowa; Iowa City IA USA