Contact us Visiting address Office Prof. MakKamerlingh Onnes BuildingSteenschuur 252311 ES LeidenRoom number C2.03 Tel. +31 71 527 7435 EmailGeneral email-address: info@ioaal.comMr. G.T. (Gerhard) Poolman: gerhardpoolman@gmail.com (secretary)Dr M. (Martijn) van Kogelenberg: mvankogelenberg@hotmail.com (treasurer)Prof. Dr V. (Vanessa) Mak: v.mak@law.leidenuniv.nl (chairwoman)