1. Hospital St. Maria, Lisbon, Portugal.
2. Vedanayagam Hospital and Postgraduate Institute, Tamilnadu, India.
3. Mannheim University Hospital, Mannheim, Germany.
4. Hospital San Borja Arriaran, Santiago, Chile.
5. University of Strasbourg, Strasbourg, France.
6. Yantai Yu Huang Ding Hospital, Yantai, China.
7. AMC University Hospital, Amsterdam, The Netherlands.