Skor Prediksi Irritable Bowel Syndrome pada Remaja dengan Nyeri Perut Berulang: Kajian Etiopatogenesis, Infestasi Blastocystis hominis, Inflamasi usus, dan Dampaknya terhadap Kualitas Hidup = Score Prediction of Irritable Bowel Syndrome among Recurrent Abdominal Pain of Adolescences: Role of Etiopathogenesis Blastocystis hominis Infestation, Intestinal Inflammation, and Its Impact on Quality of Life