Journal article (2004) - B Smodis (author), M.L. Pignata (author), H.T. Wolterbeek (author), E Steinnes (author), MC Freitas (author), A Lucaciu (author), M Frontasyeva (author), M Saiki (author), E Cortes (author), N Bangfa (author), B Markert (author), B Nyarko (author), J Arunachalam (author), J Garty (author), M Vutchkov (author)