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All experiments were performed in accordance with the approved guidelines and regulations of Human Ethics committee and the Institutional Bio-Safety Committee of University of Calcutta

Step 2: Use the Correct Age Calculation Tool at the Point-of-Sale Use the right tool and use the right 18, 19 or 21-year version for your state or local laws minimum-age requirement -- whether its built into your cash register with an age-prompt or one of We Cards tools and require your employees to use it each-and-every time

Patient and public involvement Patients were not involved in this research

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