1. Department of Preventive Medicine, Konkuk University School of Medicine, Seoul, Korea.
2. Department of Occupational and Environmental Medicine Center, Korea Medical Institute, Seoul Korea.
3. Home Visit Healthcare Team, Expert Group on Health Promotion for Seoul Metropolitan Government, Konkuk University, Seoul, Korea.
4. Department of Obstetrics and Gynecology, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.