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Bal A, Mishra B, Singh N, Das A, Jindal SK.Bal A, et al. Among authors: singh n.APMIS. 2009 Oct;117(10):773-7. doi: 10.1111/j.1600-0463.2009.02528.x.APMIS. 2009.PMID: 19775347
Singh N, Srinivas R, Bal A, Aggarwal AN.Singh N, et al.Med Oncol. 2009 Dec;26(4):424-8. doi: 10.1007/s12032-008-9141-4. Epub 2008 Dec 9.Med Oncol. 2009.PMID: 19067256Review.
Singh N, Aggarwal AN, Gupta D, Behera D, Jindal SK.Singh N, et al.Cancer Epidemiol. 2010 Feb;34(1):101-4. doi: 10.1016/j.canep.2009.12.015. Epub 2010 Jan 15.Cancer Epidemiol. 2010.PMID: 20079703
Singh N, Aggarwal AN, Behera D, Jindal SK.Singh N, et al.J Thorac Oncol. 2010 Feb;5(2):236-9. doi: 10.1097/JTO.0b013e3181c3f5f7.J Thorac Oncol. 2010.PMID: 20101147Free article.
Singh N, Bal A, Aggarwal AN, Das A, Behera D.Singh N, et al.Future Oncol. 2010 May;6(5):741-67. doi: 10.2217/fon.10.30.Future Oncol. 2010.PMID: 20465389Review.
Khan A, Agarwal R, Aggarwal AN, Gupta N, Bal A, Singh N, Gupta D.Khan A, et al. Among authors: singh n.Natl Med J India. 2011 May-Jun;24(3):136-9.Natl Med J India. 2011.PMID: 21786840
Singh N, Bal A.Singh N, et al.Arch Bronconeumol. 2012 Mar;48(3):99-101. doi: 10.1016/j.arbres.2011.06.019. Epub 2011 Sep 17.Arch Bronconeumol. 2012.PMID: 21930334English, Spanish.