Secretariat: Room 105, College of Medicine Building University of the East — Ramon Magsaysay Memorial Medical Center Aurora Blvd., Quezon City Philippines Tel./Fax +632-7161850

The Korean Society of Gastrointestinal Endoscopy, The Korean Medical Association Building 302-75, Icheon-1 Dong, Yongsan-Ku, Seoul, 140-030, Korea Tel. 82-2-798-1552 Fax 82-2-798-5398 E-mail gie@doctors.co.kr

Prof. Qi-lian Zhang Dept. of Surgery First Teaching Hospital Beijing Medical University Chang Qiao, Xi Cheng Yu Beijing, China Tel. +86-10-66171122 Ext. 2437 Fax +86-10-66176450

Markusovszky Teaching Hospital 9700 Szombathely, Markusovszky u. 3 Tel. 36-94-311542 Fax 36-94-327873

Calle 11 n8 1129 18 \(A\) 1900 — La Plata Provincia de Buenos Aires Republica Argentina Tel. 54-21-241991 Fax 54-21-2225111

Dr. L. Aabakken Medical Department of «Gastroenterology Ulleval University Hospital N-0407 Oslo, Norway Tel. 0047-22-119168 Fax 0047-23-015930

Dr. F. M. Nagengast Radbout Ziekenhuis G. Grooteplein Zuid 8 6525 GA Nijmegen The Netherlands Tel. +31-24-3614760 Fax +31-24-3540103