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International Ambassador Program

SIO membership includes colleagues from over 40 countries. In order to grow our society’s international reach, the SIO Global Task Force began the SIO International Ambassador Program. Our goal is to name as ambassadors integrative oncology experts from each major world region, and a national ambassador for each nation in that region. 

The role of ambassadors is to provide a global network of persons and institutions in the field of integrative oncology which share SIO’s focus on evidence-informed integrative medicine in the context of comprehensive cancer care. SIO envisions sharing and promoting rigorous scientific standards as demonstrated by SIO-ASCO Clinical Practice Guidelines development and publications, and adapting North American guidelines to each region’s unique culture and cancer care field. In this way, we aim to fulfill our mission to improve the lives of those affected by cancer. 

Regional Ambassadors

Europe & Middle East

Eran Ben-Arye, MD

Director, Integrative Oncology Program, Lin, Carmel & Zebulun Medical Centers, Israel Associate Professor, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Israel Society for Integrative Oncology (SIO) Regional Ambassador to Europe and the Middle East

National Ambassadors


Judith Lacey, MD, FAChPM

Director of Supportive Care and Integrative Oncology Chris O’Brien Lifehouse Sydney, Australia

Ricardo Ghelman, MD

Pediatric oncologist Founding President, CABSIN – Consórcio Acadêmico Brasileiro de Saúde Integrativa São Paulo, Brazil
United Kingdom

Catherine Zollman, MRCP, MRCGP

Medical Director at Penny Brohn UK Bristol, U.K. (Integrative SUpport and Self-Management Education) Clinical Lead, SWAG NHS Cancer Alliance (Personalized Care and Support)

Yet to be named: Regional Ambassadors to the following world regions: Asia, Africa, Central/South America, New Zealand and Asia Pacific