Total Laryngectomy Versus Larynx Preservation for T4a Larynx Cancer: Patterns of Care and Survival Outcomes - Grover, S; Swisher-McClure, S; Mitra, N; Li, J; Cohen, R B; Ahn, P H; Lukens, J N; Chalian, A A; Weinstein, G S; O'Malley, B W, Jr; Lin, A (Int J Radiat Oncol Biol Phys, 2015)