The district court dismissed appellants' suit under Federal Rule of Civil Procedure 12(b)(6) for failure to state a claim upon which relief may be granted. Colon Health Centers of Am., LLC v. Hazel, No. 1:12CV615, 2012 WL 4105063, at *11 (E.D.Va. Sept. 14, 2012). On appeal, we affirmed the dismissal of appellants' Fourteenth Amendment claims, reversed the dismissal of the dormant Commerce Clause claim, and remanded the case for further factual development on the Commerce Clause issue.