TY - JOUR T1 - Protection against laryngeal and pharyngeal carcinoma: Heterozygous vs. homozygous deletions of GSTM1 and GSTT1 JO - Genetics and Molecular Biology A1 - Masood, Nosheen A1 - Kayani, Mahmood Akhtar SN - 1415-4757 UL - 10.1590/S1415-47572013005000006 VL - 36 Y1 - 2013 PB - Brasil ER -