1. Genetic Factors for Smoking Boost Chronic Bronchitis Risk
Swedish study says it's first to quantify heritability of the disease

2. Study Links Snoring to Chronic Bronchitis
Reasons for the association are unknown, researchers say

3. Chronic obstructive pulmonary disease  (Trust Mark: Doctor-Reviewed)
Chronic obstructive pulmonary disease (COPD) is lung disease that makes it difficult to breathe. There are two main forms of COPD: Chronic bronchitis, which causes long-term swelling and a large amount of mucus in the main airways in the lungs; Em...• Reviewer: Benjamin Medoff, MD, Assistant Professor of Medicine, Harvard Medical School, Pulmonary and Critical Care Unit, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.