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Andre Madsen Hormone Laboratory, Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway
Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark

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Anders Juul Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark

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Lise Aksglaede Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark

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analyses The native principal component analysis (PCA) function ‘prcomp()’ in R was applied to the SDS profiles of prepubertal controls and boys with KS in the dataset, as previously demonstrated ( 23 ). The ‘ggbiplot’ package was used to visualize the

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Shanlee M Davis Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
eXtraOrdinarY Kids Clinic, Children's Hospital Colorado, Aurora, Colorado, USA

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Rhianna Urban Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA

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Angelo D’Alessandro Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado, USA

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Julie A Reisz Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado, USA

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Christine L Chan Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA

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Megan Kelsey Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA

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Susan Howell Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
eXtraOrdinarY Kids Clinic, Children's Hospital Colorado, Aurora, Colorado, USA

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Nicole Tartaglia Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
eXtraOrdinarY Kids Clinic, Children's Hospital Colorado, Aurora, Colorado, USA

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Philip Zeitler Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
eXtraOrdinarY Kids Clinic, Children's Hospital Colorado, Aurora, Colorado, USA

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Peter Baker II Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA

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used to generate a volcano plot identifying metabolites with a fold change >1.5 and FDR <0.05. To determine if a unique metabolome profile is present in KS, partial least squares – discriminant analysis (PLS-DA), a variant of principal component

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