230 CONTRIBUTIONS OF THE AUTHORS Chapter 2 Regional differences in perceived oral dryness as determined with a newly developed questionnaire, the Regional Oral Dryness Inventory: All authors (Z. Assy, D.H.J. Jager, E. Mashhour, F.J. Bikker, H.S. Brand) contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Z. Assy and E. Mashhour. The first draft of the manuscript was written by Z. Assy, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript. Chapter 3 Differences in perceived intra-oral dryness in various dry-mouth patients as determined using the Regional Oral Dryness Inventory: All authors (Z. Assy, C.P. Bots, H.Z. Arisoy, S.S. Gülveren, F.J. Bikker, H.S. Brand) contributed to the conception and design of the study. Material preparation, data collection, and analysis were performed by Z. Assy, H.Z. Arisoy and S.S. Gülveren. The first draft of the manuscript was written by Z. Assy, and all the authors commented on successive versions of the manuscript. All the authors read and approved the definitive manuscript. Chapter 4 Determination of intra-oral surface areas by cone-beam computed tomography analysis and their relation with anthrometric measurements of the head: Z. Assy contributed to conception, design, data acquisition and interpretation, performed all statistical analyses, drafted and critically revised the manuscript; C. Klop contributed to conception, data acquisition and interpretation and critically revised the manuscript; H.S. Brand contributed to conception, design, contributed to analysis and critically revised the manuscript; R.C. Hoogeveen contributed to conception, design and critically revised the manuscript; J.H. Koolstra contributed to conception, design and critically revised the manuscript; F.J. Bikker contributed to conception, design, data interpretation, drafted and critically revised the manuscript.
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