International scientific cooperation
- IOF – International Osteoporosis Foundation
- EFORT – European Federation of National Associstions of Orthopaedics and Traumatology
- The Bone and Joint Decade 2000-2010
- EPOS – European Prospective Osteoporosis Study
- Royal National Hospital for Rheumatic Diseases, Bath, England, prof. Francis Ring
- Forschungruppe Med. Physik Osteopor. Universitat Kiel, prof. Claus. C. Gluer
- University Hospital CHUV, Lausanne, Switzerland, prof. Peter Burckhardt
- Bone and Mineral Research Leiden University, Holland, prof. Socrates Papapoulos
- Royal Institute of Orthopaedics, Oswestry, England, prof. James Richardson
- Department of Radiology, University of California, USA, prof. Harry K. Genant
- Orthopaedic Clinic Bartow, University Hospital, USA, dr Stan Zemankiewicz.