Guidelines 1 Metals, heavy adverse effects 1 Metals, heavy standards 1 Metals, heavy toxicity 1 Series 1 Smoking 1 Tobacco 1 Tobacco Products 1 Tobacco chemistry 1 Tobacco control campaigns 1 Tobacco industry legislation 1 Tobacco use disorder prevention and control 1 WHO study group on tobacco product regulation 1 World Heallth Organization, Regional Office for South-East Asia 1 World Health Organization 1