Smoked food is more popular in North eastern states of India.  Majority of the people in these states consume dried salted fish, fermented, smoked and pickled meat  [1,2,3,4,5]. 

1. Fritz W, Soós K. Smoked food and cancer. 1980;(29):57-64.
2. Dikshit RP, Mathur G, Mhatre S, et al. Epidemiological review of gastric cancer in India. Indian J Med PaediatrOncol. 2011 Jan-Mar; 32(1): 3–11.doi:  4103/0971-5851.81883 PMCID: PMC3124986.
3. Barad AK, Mandal SK, Harsha HS, et al. Gastric cancer—a clinicopathological study in a tertiary care centre of North-eastern India. J GastrointestOncol. 2014 Apr; 5(2): 142–147. doi: 3978/j.issn.2078-6891.2014.003 PMCID: PMC3999624
4. Phukan RK, Narain K, Zomawia E, Hazarika NC, Mahanta J. Dietary habits and stomach cancer in Mizoram, India.J Gastroenterol. 2006 May;41(5):418-24.
5. Siddiqi M, Tricker AR, Preussmann R Formation of N-nitroso compounds under simulated gastric conditions from Kashmir foodstuffs.CancerLett. 1988 Apr;39(3):259-65.