Higher body mass index may advance asthma among adolescents with pre-asthmatic symptoms: a prospective cohort study

Department of Public Health, China Medical University, Taichung City, Taiwan Institute of Environmental Health, China Medical University, Taichung City, Taiwan Department of Environmental and Occupational Health, School of Public Health, University of North Texas Health Science Centre, Fort Worth, Texas, USA Department of Integrative Physiology and Cardiovascular Research Institute, University of North Texas Health Science Centre, Fort Worth, Texas, USA Department of Health Risk Management, China Medical University, Taichung City, Taiwan Department of Biostatistics, Tulane University, New Orleans, Louisiana, USA Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University, Taipei City, Taiwan Institute of Preventive Medicine, National Taiwan University, Taipei City, Taiwan