... clusters

Tables 6, 7a-7g, the colour prints of Figs. 12a-12g and Figs. 13a-13g are only available in electronic form at http://www.edpsciences.com. The complete set of profiles is available upon request from the authors. Tables 7a-7g are also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.188.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/387/26

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