Conception and design: Park, Wang, Lafage, Okonkwo, Uribe, Eastlack, Anand, La Marca. Acquisition of data: all authors. Analysis and interpretation of data: Park, Wang, Lafage, Nguyen, Ziewacz, Eastlack, Deviren. Drafting the article: Lafage, Ziewacz. Critically revising the article: Park, Lafage. Reviewed submitted version of manuscript: all authors. Approved the final version of the manuscript on behalf of all authors: Park. Statistical analysis: Study supervision: Park, Wang, Lafage, Okonkwo, Uribe, Anand, Fessler, Kanter, La Marca, Mummaneni.