1. Department of Crystallography; Faculty of Chemistry; A. Mickiewicz University and Center for Biocrystallographic Research; Institute of Bioorganic Chemistry; Polish Academy of Sciences; Poznan Poland
2. Synchrotron Radiation Research Section; Macromolecular Crystallography Laboratory; NCI; Argonne National Laboratory; IL USA
3. Protein Structure Section; Macromolecular Crystallography Laboratory; NCI at Frederick; MD USA