Chronic periodontitis and smoking Prevalence and dose-response relationship

From the Centre of Rural Health (Khan), School of Health Sciences, University of Tasmania, Tasmania, Australia, the Department of Restorative Dentistry (Khalid), Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia, the Faculty of Dentistry (Khan), Karachi Medical and Dental College, Karachi, Pakistan, and the Department of Oral Medicine & Diagnostic Sciences (Awan), College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia

From the Centre of Rural Health (Khan), School of Health Sciences, University of Tasmania, Tasmania, Australia, the Department of Restorative Dentistry (Khalid), Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia, the Faculty of Dentistry (Khan), Karachi Medical and Dental College, Karachi, Pakistan, and the Department of Oral Medicine & Diagnostic Sciences (Awan), College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia

From the Centre of Rural Health (Khan), School of Health Sciences, University of Tasmania, Tasmania, Australia, the Department of Restorative Dentistry (Khalid), Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia, the Faculty of Dentistry (Khan), Karachi Medical and Dental College, Karachi, Pakistan, and the Department of Oral Medicine & Diagnostic Sciences (Awan), College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia