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Willem H Collier

Assistant Professor Of Clinical Population and Public Health Sciences

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Email [email protected]
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Overview

I am an Assistant Professor of Clinical Population and Public Health Sciences in the Division of Biostatistics of the Department of Population and Public Health Sciences at the University of Southern California. I support the design, conduct, and analysis of pediatric cancer clinical trials of the Children’s Oncology Group, where I focus on supportive care, survivorship, and cellular therapy trials. I also work on statistical methods for the evaluation of surrogate endpoints, focusing on Bayesian hierarchical modeling for meta-regression. Through my work in surrogate endpoints I collaborate with the Chronic Kidney Disease Epidemiology Collaboration.

Education and Training

  • University of Utah, Utah — PhD — 2022 — Population Health Sciences, Biostatistics Emphasis
  • University of Utah, Utah — BS — 2017 — Mathematics, Statistics Emphasis
  • University of Utah, Utah — Honors BS — 2017 — Economics

Publications

  • On Hierarchical Composite Endpoints in Pediatric Cancer Supportive Care: Illustrative Examples From Two Multi-Center Phase-III Randomized Clinical Trials. Pediatr Blood Cancer. 2026 Jul 25.. View in PubMed
  • Evaluating the use of hierarchical composite endpoints in pediatric cancer supportive care clinical trials: Illustrative examples from two multi-center phase-III randomized clinical trials. medRxiv. 2026 Jan 23.. View in PubMed
  • A meta-analysis of albuminuria as a surrogate endpoint for kidney failure. Nat Med. 2026 01; 32(1):281-287.. View in PubMed
  • A Randomized Clinical Trial Evaluating Lactiplantibacillus Plantarum for the Prevention of GI aGvHD: A Report From the Children’s Oncology Group (ACCL1633). Transplant Cell Ther. 2025 Jul; 31(7):452.e1-452.e12.. View in PubMed
  • Clinical Implications of Slope of GFR in Clinical Trials of CKD Progression. Clin J Am Soc Nephrol. 2025 05 01; 20(5):632-641.. View in PubMed
  • Effect of rabbit ATG PK on outcomes after TCR-αβ/CD19-depleted pediatric haploidentical HCT for hematologic malignancy. Blood Adv. 2024 Dec 10; 8(23):6003-6014.. View in PubMed
  • Otoprotective Effects of Sodium Thiosulfate by Demographic and Clinical Characteristics: A Report From Children’s Oncology Group Study ACCL0431. Pediatr Blood Cancer. 2025 Mar; 72(3):e31479.. View in PubMed
  • Design and methods of the StepByStep randomized trial of a mobile health and social media physical activity intervention among adolescent and young adult survivors of childhood cancer: A report from the Children’s Oncology Group. Contemp Clin Trials. 2024 10; 145:107645.. View in PubMed
  • Comparing Bayesian hierarchical meta-regression methods and evaluating the influence of priors for evaluations of surrogate endpoints on heterogeneous collections of clinical trials. BMC Med Res Methodol. 2024 02 16; 24(1):39.. View in PubMed
  • Effect of carvedilol versus placebo on cardiac function in anthracycline-exposed survivors of childhood cancer (PREVENT-HF): a randomised, controlled, phase 2b trial. Lancet Oncol. 2024 02; 25(2):235-245.. View in PubMed

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