Editorial

1. West meets east: Chinese and US doctors addressing the medical ecology and disease management from both countries' perspectives
2. Introduction to special edition: The challenge of chronic noncommunicable disease and the opportunity for transforming health care through primary care based population health management

Section One: The Chronic Disease Challenge for General Practitioners

1. Availability and social determinants of community health management service for patients with chronic diseases:An empirical analysis on elderly hypertensive and diabetic patients in an eastern metropolis of China
2. Menopause and the risk of metabolic syndrome among middle-aged Chinese women
3. "Three essential elements" of the primary health care system:A comparison between California in the US and Guangdong in China

Section Two: Population Health Management for General Practitioners

1. The Accountable Care Organization results: Population health management and quality improvement programs associated with increased quality of care and decreased utilization and cost of care
2. Team-based stepped care in integrated delivery settings
3. A population-based approach to the management of depression in a patient-centered medical home
4. Effectiveness of an employment-based smoking cessation assistance program in China

Section Three: Primary Care Process Improvement

1. Evaluating the process of mental health and primary care integration:The Vermont Integration Profile