Institution: | 1. Section for Science of Complex Systems, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria;2. Departamento de Física, Universidade Estadual de Maringá, Avenida Colombo, 5790, 87020-900 Maringá, PR, Brazil;3. Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, USA;4. IIASA, Schlossplatz 1, A-2361 Laxenburg, Austria |