Perbandingan Nilai Heart Rate Variability Sebagai Surrogate Marker Disfungsi Saraf Otonom pada Penderita Refluks Laringofaring Dibanding Populasi Non-Refluks = Comparison of Heart Rate Variability Value As Surrogate Marker of Autonomic Nerve Dysfunction in Patient with Laryngopharyngeal Reflux Compared to Non-Reflux Population