◎ 대한 외과학회 ◎ 대한 암학회   ◎ 대한 대장항문학회 ◎ 대한 혈관외과학회   ◎ 대한간담췌외과학회 ◎ Med Mark: Medical Bookmarks ◎ American Medical Association ◎ American Pharmaceutical Association ◎ Health Industry Manufacturers Association ◎ Brigham and Women"s Hospital ◎ Cedars- Sinal Hospital ◎ Cleveland Clinic Forndation ◎ Duke Univ. Medical Center ◎ Harvard Medical Web ◎ Johns Hopkins(JHMI) ◎ Messachusetts General Hospital ◎ Mayo Clinic ◎ Stanford Univ. Medical Center ◎ UCLA - MedNet ◎ Washington Hospital Center