DENVER - The Colorado Supreme Court on April 7 granted natural gas extraction companies leave to appeal a July opinion from the Colorado Court of Appeals, Division I, holding that modified case management orders requiring plaintiffs to provide prima facie evidence in support of their claims before discovery are barred as a matter of state law (Antero Resources, et al. v. William G. Strudley, et al., No. 2013SC576, Colo. Sup.).