@article{masood_kayani_2013,  title={Protection against laryngeal and pharyngeal carcinoma: Heterozygous vs. homozygous deletions of GSTM1 and GSTT1},  volume={36},  ISSN={1415-4757},  url={https://doi.org/10.1590/S1415-47572013005000006},  DOI={10.1590/S1415-47572013005000006},  number={1},  journal={Genetics and Molecular Biology},  publisher={Sociedade Brasileira de Genética},  author={Masood, Nosheen and Kayani, Mahmood Akhtar},  year={2013},  pages={1–6} }