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 : Calling your health care provider  (Trust Mark: Doctor-Reviewed)
Go to the emergency room or call the local emergency number (such as 911) if you have a rapid increase in shortness of breath.• 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.