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Present address: Department of Astronomy, University of Maryland, College Park, MD 20742-2421, USA.

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... diagrams

This interactive fitting was done with the task INSPECTOR, implemented in the Groningen Image Processing System (GIPSY, http://www.astro.rug.nl/~gipsy)

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... derived

After we derived the rotation curves for the galaxies in our sample, alternative methods to derive the rotation curves for edge-on galaxies have been published that are more objective (e.g., Kregel & van der Kruit 2004; García-Ruiz et al. 2002). Because of the intrinsic uncertainties in the derivation of the rotation curves of edge-on galaxies, and given that we do not use the rotation curve for the edge-on galaxies in our analysis, we have not rederived the rotation curves.

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