1. Institute of Biochemistry and Biophysics, Polish Academy of Sciences, ul Rakowiecka 36, 02-532 Warsaw, Poland
2. Division of Hematology and Oncology, University of Utah, School of Medicine, Salt Lake City, UT 84132, U.S.A.
3. Laboratoire de Biochimie des Porphyrines, Institut Jacques Monod, Universite Paris 7, 2 Place Jussieu, 75251 Paris Cédex 05, France