[1] UNIV PARMA, FAC MED & CHIRURG, IST CHIM BIOL, I-43100 PARMA, ITALY
[2] UNIV BARI, CNR, CTR STUDI MITOCONDR & METAB ENERGET, I-70126 BARI, ITALY
[3] UNIV RIJEKA, FAC PEDAGOGY, YU-51000 RIJEKA, YUGOSLAVIA
[4] NATL RES COUNCIL CANADA, DIV BIOL SCI, OTTAWA K1A 0R6, ONTARIO, CANADA
[5] UNIV PARMA, DEPARTIMENTO FIS, SEZIONE BIOFIS, GNCB, I-43100 PARMA, ITALY
[6] UNIV BARI, DEPARTIMENTO BIOCHIM & BIOL MOLEC, I-70126 BARI, ITALY