1. Indonesian Central Statistical Bureau Indonesian demographic profile 2013 http://www.bps.go.id/
2. Ministry of Health Republic of Indonesia Indonesia health profile 2009 http://www.depkes.go.id/
3. Pang , RTP Observation with peritoneoscopy in liver disease in Indonesia 1958
4. Hadi , S The development of gastrointestinal endoscopy in Indonesia and overseas 1987 1 7
5. Simadibrata , S The use of gastroscopy in stomach disorder 1971 154 156