On the 18th and 19th of September of 2009 the Meeting " Purines - 80 years and very much alive " took place in Stockholm with the presence of the Prof. Doctor Alexandre Ribeiro.
Figure I - Photography of the participants of the meeting « Purines - 80 years and very much alive», realizada no NOBELFORUM do Institute Korolinska, Stockholm, Sweden, a 18-19 Setembro 2009.
Primeira fila (da esquerda): Oleg Krishtal, Alan North, Geoffrey Burnstock, Alexandre Ribeiro, Michail Sitkovsky, Maria-Teresa Miras-Portugal, Maiken Nedergaard, Bruce Cronstein;
Segunda fila: Bertil Fredholm, Kendall Harden, Herbert Zimmerman, Alexei Verkhratsky, Helmut Kettenmann, Jurgen Schrader. (revista: Acta Physiologica - Official Journal of the Federation of European Physiological Societies)