EUROPEAN SOCIETY OF SURGICAL ONCOLOGY (ESSO)
EUROPEAN SOCIETY FOR MEDICAL ONCOLOGY (ESMO)
EUROPEAN ORGANIZATION FOR RESEARCH AND TREATMENT OF CANCER (EORTC)
AMERICAL COLLEGE OF SURGEONS (ACS)
AMERICAN SOCIETY OF CLINICAL ONCOLOGY (ASCO)
AMERICAN SURGICAL ASSOCIATION (ASA)
AMERICAN INSTITUTE FOR CANCER RESEARCH (AICR)
AMERICAN SOCIETY OF COLON AND RECTAL SURGEONS (ASCRS)
NATIONAL CANCER INSTITUTE (NIH)