abdomen acid reflux BMI diabetes disease endoscopic endoscopic minimally invasive surgery gallbladder gallstone gastroesopageal reflux heartburn hernia high blood pressure HKSurgeon hyperlipidemia inguinal hernia intragastric balloon laparoscopic laparoscopic gastric bypass laparoscopic surgery laparoscopy liver metabolic syndrome minimally invasive surgery morbid obesity obese obesity ProCare small intestine stones strenuous exercise surgery the abdominal wall tumors weight loss 免疫能力 出血 大腸癌 大腸鏡 微創手術 手術 疝氣 結石 膽管 膽結石