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1 Introduction
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2 Observations and data reduction
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3 Model atmospheres and stellar parameters
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4 Stellar abundances
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5 Results and discussion
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6 Summary and conclusions
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References
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Online Material
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Appendix A: Line list and equivalent widths
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Appendix B: Photometric and spectroscopic indices
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Appendix C: S and Zn abundances in DLAs
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