Author Contributions: Dr Repping had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Sadri-Ardekani, Akhondi, van der Veen, Repping, van Pelt.
Acquisition of data: Sadri-Ardekani, Repping, van Pelt.
Analysis and interpretation of data: Sadri-Ardekani, Repping, van Pelt.
Drafting of the manuscript: Sadri-Ardekani, Repping, van Pelt.
Critical revision of the manuscript for important intellectual content: Sadri-Ardekani, Akhondi, van der Veen, Repping, van Pelt.
Obtained funding: Repping, van Pelt.
Administrative, technical, or material support: Sadri-Ardekani, Akhondi, van Pelt.
Study supervision: van der Veen, Repping, van Pelt.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: This study was supported by a grant from the Dutch Children Cancer Free Foundation (Foundation KiKA).
Role of the Sponsor: Foundation KiKA had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Additional Contributions: We express gratitude to the following staff of the Infertility Clinic at the Avicenna Research Institute: Naser Amirjannati, MD, and Hamed Akhavizadegan, MD, for providing patient samples; Mohammad-Reza Sadeghi, PhD, for cryopreservation of testicular tissue; and Haleh Soltanghoraei, MD, for the evaluation of testicular histology. Furthermore, we thank Saskia K. van Daalen, BSc; Cindy M. Korver, BSc; and Hermien L. Roepers-Gajadien, BSc (Center for Reproductive Medicine, Academic Medical Centre), for their technical assistance. We also thank Dirk de Rooij, PhD (Center for Reproductive Medicine, Academic Medical Centre), for critically reviewing the manuscript. None of these persons received compensation for their contributions.