Perbandingan proporsi paradoxical vocal cord movement pada populasi asma dan non-asma. Kajian faktor risiko aktivitas fisik, refluks laringofaring, imbalans sistem saraf otonom, dan penurunan ambang laryngeal adductor reflex = Comparison of proportion of Paradoxical Vocal Cord Movement (PVCM) in asthmatic and non-asthmatic population. Study of risk factors of physical activity, laryngopharyngeal reflux, autonomic nervous system imbalance, and decreased threshold of laryngeal ad