Locke Lord Bissell & Liddell LLP

SNR Denton

Akin Gump Strauss Hauer & Feld LLP

Gardere Wynn Sewell LLP

Haynes and Boone, LLP

Andrews Kurth LLP

Bracewell & Giuliani LLP

Fulbright & Jaworski L.L.P.

Gibson, Dunn & Crutcher LLP

Jones Day

K&L Gates LLP

Scheef & Stone LLP

Vinson & Elkins LLP

Weil, Gotshal & Manges LLP

Winstead PC

Zelle, Hofmann, Voebel & Mason LLP