1. Institute
of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
2. Ratiopharm GmbH, Graf-Arco-Str. 3, 89079 Ulm, Germany
3. Teva Czech Industries s.r.o., Branisovska 31, 370 05 Ceske Budejovice, Czech Republic