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According to the World Health Organization's (WHO) Framework Convention on Tobacco Control (FCTC) Conference of the Parties (COP6) report, global expenditure on e-cigarettes was $3 billion in 2013, with sales projected to increase 17-fold by 2030 [25]

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

This suggests that while smoking may initially increase testosterone levels, prolonged or heavy use may have the opposite effect

Current cigar use was linked to a higher risk of stroke, atrial fibrillation, and heart failure