- Cleveland Clinic, Cleveland (V. Fazio, J. Milsom) 1997
- Cleveland Clinic, Fort Lauderdale (St. Wexner) 1997
- Roger Williams Medical Center, Providence (H. Wanebo) 1997
- Memorial Sloan-Kettering Cancer Center, New York (A. Cohen) 1997
- University Of California, San Francisco (J. Vaeth) 1997
- Keio University School Of Medicine, Tokio (M. Kitajima) 1997
- Kyoto University, Kyoto (M. Abe) 1997
- Prince Of Wales Hospital, Sydney (G. Newstead) 2000
- Royal North Shore Hospital, Sydney (J. Percy) 2000
- University Of Melbourne, Melbourne (J. Mackay) 2000
- Seoul National University College Of Medicine, Seoul (H.K. Yang) 2003
- Paul Brousse Hopital, Paris (H. Bismuth) 2005
- Cleveland Clinic, Fort Lauderdale (St. Wexner) 2013
- German Oncology Center – Schwerpunkt Brachytherapie, Limassol (N. Zamboglou) 2018