Lestari, D.A., Digestive Surgery Division, Department of Surgery, Faculty of Medicine, Universitas Indonesia Cipto Mangunkusumo Hospital, Jl Diponegoro No 71, Salemba, Jakarta Pusat, 10430, Indonesia; Rahadiani, N., Department of Anatomical Pathology, Faculty of Medicine, Universitas Indonesia Cipto Mangunkusumo Hospital, Jl Diponegoro No 71, Salemba, Jakarta Pusat, 10430, Indonesia; Syaiful, R.A., Digestive Surgery Division, Department of Surgery, Faculty of Medicine, Universitas Indonesia Cipto Mangunkusumo Hospital, Jl Diponegoro No 71, Salemba, Jakarta Pusat, 10430, Indonesia