Dr. L.T. (Lourens) Bloem

Assistant Professor
Pharmacoepi. and Clinical Pharmacol.
l.t.bloem@uu.nl

Selection of key publications

  • Brinkhuis, F., Goettsch, W. G., Mantel - Teeuwisse, A., & Bloem, L. T. (2024). Added benefit and revenues of oncology drugs approved by the European Medicines Agency between 1995 and 2020: retrospective cohort study. The BMJ, 384, e077391. https://doi.org/10.1136/bmj-2023-077391
  • Brinkhuis, F., Goettsch, W. G., Mantel - Teeuwisse, A., & Bloem, L. T. (2024). High cost oncology drugs without proof of added benefit are burdening health systems. The BMJ, 384, q511. https://doi.org/10.1136/bmj.q511
  • Gort, J., van Hattem, C. C., Bloem, L. T., & ten Ham, R. M. T. (2023). Geneesmiddelen voor Geavanceerde Therapie (ATMP’s) in Nederland: Veldverkenning, Knelpuntanalyse en Activiteitenkaart. Utrecht University. https://doi.org/10.33540/1874/433501
    Note: Report in Dutch; translated title: 'Advanced Therapy Medicinal Products (ATMPs) in the Netherlands: Field Map, Bottleneck Analysis, and Activity Map'

Publications

2024

Scholarly publications

Hogervorst, M. A., van Hattem, C. C., Sonke, G. S., Mantel-Teeuwisse, A. K., Goettsch, W. G., & Bloem, L. T. (2024). Healthcare decision-making for tumour-agnostic therapies in Europe: lessons learned. Drug Discovery Today, 104031. Advance online publication. https://doi.org/10.1016/j.drudis.2024.104031
Madrid Paredes, J., Versteeg, J.-W., Vreman, R. A., & Bloem, L. T. (2024). Agreement about Availability of Alternative Treatments for Innovative Drugs Assessed by the EMA and HTA Organizations. Clinical Pharmacology and Therapeutics. Advance online publication. https://doi.org/10.1002/cpt.3252
Brinkhuis, F., Goettsch, W. G., Mantel - Teeuwisse, A., & Bloem, L. T. (2024). High cost oncology drugs without proof of added benefit are burdening health systems. The BMJ, 384, Article q511. https://doi.org/10.1136/bmj.q511
Brinkhuis, F., Goettsch, W. G., Mantel - Teeuwisse, A., & Bloem, L. T. (2024). Added benefit and revenues of oncology drugs approved by the European Medicines Agency between 1995 and 2020: retrospective cohort study. The BMJ, 384, Article e077391. https://doi.org/10.1136/bmj-2023-077391
Verweij, S., Haverhoek, V., Bergman, E., Westman, G., & Bloem, L. T. (2024). A Natural Language Processing Approach towards Harmonized Communication of Uncertainties Identified during the European Medicine Authorization Process. Clinical Pharmacology and Therapeutics, 115(4), 871-880. https://doi.org/10.1002/cpt.3195
Verschueren, M. V., Peters, B. J., Bloem, L. T., Kruik, V. R., Uitvlugt, E. B., Bijsmans, A. R., Egberts, A. C., & van de Garde, E. M. (2024). Pembrolizumab Plus Chemotherapy Per PD-L1 Stratum In Patients With Metastatic Non-Small Cell Lung Cancer: Real-World Effectiveness Versus Trial Efficacy. Clinical Lung Cancer, 25(2), 119-127.e1. https://doi.org/10.1016/j.cllc.2023.12.011

2023

Scholarly publications

van den Berg, R. B., Laarman, A. R. C., Bloem, L. T., Dijkstra, J. A., Veldkamp, A. I., Allegaert, K., Swart, E. L., & van Weissenbruch, M. M. (2023). Neonatal pain score after use of paracetamol: Is there a relationship with serum trough concentration at steady state in preterm and term neonates? International Journal of Clinical Pharmacology and Therapeutics, 61(8), 354 - 362. https://doi.org/10.5414/CP204431
Verschueren, M. V., Dijs, T., Gulikers, J. L., Veelen, A. V., Croes, S., Hendriks, L. E., Smit, A. A., Bloem, L. T., Egberts, A. C., van de Garde, E. M., & Peters, B. J. (2023). Durvalumab after chemoradiotherapy in patients with stage III non-small-cell lung cancer: real-world outcomes versus clinical trial results. Immunotherapy, 15(11), 839-851. https://doi.org/10.2217/imt-2023-0002
Bloem, L. T., Schelhaas, J., López-Anglada, L., Herberts, C., van Hennik, P. B., & Tenhunen, O. (2023). European Conditional Marketing Authorization in a Rapidly Evolving Treatment Landscape: A Comprehensive Study of Anticancer Medicinal Products in 2006-2020. Clinical Pharmacology and Therapeutics, 114(1), 148-160. https://doi.org/10.1002/cpt.2906

Professional publications

Gort, J., van Hattem, C. C., Bloem, L. T., & ten Ham, R. M. T. (2023). Geneesmiddelen voor Geavanceerde Therapie (ATMP’s) in Nederland: Veldverkenning, Knelpuntanalyse en Activiteitenkaart. Utrecht University. https://doi.org/10.33540/1874/433501
European Commission, Directorate-General for Health and Food Safety, Mantel - Teeuwisse, A., Bloem, L. T., Boon, W., De Bruin, M. L., Hoekman, J., Klein, K., Stolk, P., & Vreman, R. (2023). Study in support of the evaluation and impact assessment of the EU general pharmaceuticals legislation: Analytical Report. Publications Office of the European Union. https://doi.org/10.2875/780874
European Commission, Directorate-General for Health and Food Safety, Mantel - Teeuwisse, A., Bloem, L. T., Boon, W., De Bruin, M. L., Hoekman, J., Klein, K., Stolk, P., & Vreman, R. (2023). Study in support of the evaluation and impact assessment of the EU general pharmaceuticals legislation: Evaluation Report. Publications Office of the European Union. https://doi.org/10.2875/62709

Other output

Hoogendoorn, M., Fabriek, B., & Bloem, L. T. (2023). Regulatory and health technology assessment of cell and gene therapies in Europe: Convergence or divergence? Pharmacoepidemiology and Drug Safety, 32, 16-16.
Eskola, S. M., Jokinen, S., Bloem, L. T., Brouwer, E., Brown, D. A., Camarero, J., De Bruin, M. L. L., Gardarsdottir, H., & Hakkarainen, K. M. (2023). Systematic review of externally controlled (EC) trials, data used in them, and their role in regulatory decision-making. Pharmacoepidemiology and Drug Safety, 32(supplement 1), 260-261. Article 260.
van Hattem, C. C., de Jong, A., de Groot, J. S., & Bloem, L. T. (2023). Feasibility of post-authorization randomized controlled trials for conditionally authorized anticancer medicines-A multistakeholder perspective. Pharmacoepidemiology and Drug Safety, 32, 623-623.
Verschueren, M., Kruik, V., Peters, B., Bloem, L., Bijsmans, A. R., Egberts, T., & van de Garde, E. (2023). Real-world versus clinical trial outcomes of pembrolizumab plus chemotherapy in patients with stage IV non-squamous non-small cell lung cancer. Journal of Thoracic Oncology, 18(4), S72-S72.

2022

Scholarly publications

Ebbelaar, C. F., Schrader, A. M. R., van Dijk, M., Meijers, R. W. J., de Leng, W. W. J., Bloem, L. T., Jansen, A. M. L., Blokx, W. A. M., & on behalf of the MOLecular Evaluation of Melanocytic Ambiguous Tumors (MOLEMAT) investigators (2022). Towards diagnostic criteria for malignant deep penetrating melanocytic tumors using single nucleotide polymorphism array and next-generation sequencing. Modern Pathology, 35(8), 1110-1120. https://doi.org/10.1038/s41379-022-01026-6
Bloem, L. T., Bot, R. E., Mantel-Teeuwisse, A. K., van der Elst, M. E., Sonke, G. S., Klungel, O. H., Leufkens, H. G. M., & Hoekman, J. (2022). Pre-approval and post-approval availability of evidence and clinical benefit of conditionally approved cancer drugs in Europe: a comparison with standard approved cancer drugs. British Journal of Clinical Pharmacology, 88(5), 2169-2179. https://doi.org/10.1111/bcp.15141
Vreman, R. A., Bloem, L. T., van Oirschot, S., Hoekman, J., van der Elst, M. E., Leufkens, H. G., Klungel, O. H., Goettsch, W. G., & Mantel-Teeuwisse, A. K. (2022). The Role of Regulator-Imposed Post-Approval Studies in Health Technology Assessments for Conditionally Approved Drugs. International Journal of Health Policy and Management, 11(5), 642-650. https://doi.org/10.34172/ijhpm.2020.198

Other output

Hogervorst, M., Goettsch, W., Mantel-Teeuwisse, A. K., Bloem, L., & Vreman, R. A. (2022). Uncertainties Around Tumour Agnostic Therapies in Europe: Barriers and Facilitators of Patient Access. Value in Health, 25(12), S266-S266.

2021

Scholarly publications

Ebbelaar, C. F., Jansen, A. M. L., Bloem, L. T., & Blokx, W. A. M. (2021). Genome-wide copy number variations as molecular diagnostic tool for cutaneous intermediate melanocytic lesions: a systematic review and individual patient data meta-analysis. Virchows Archiv, 479(4), 773-783. https://doi.org/10.1007/s00428-021-03095-5
Bloem, L. T. (2021). Evidence generation on benefits and risks of medicines and its impact on regulatory and downstream decision-making. [Doctoral thesis 1 (Research UU / Graduation UU), Universiteit Utrecht]. Utrecht University. https://doi.org/10.33540/888
Bloem, L. T., Karomi, M., Hoekman, J., van der Elst, M. E., Leufkens, H. G. M., Klungel, O. H., & Mantel-Teeuwisse, A. K. (2021). Comprehensive evaluation of post-approval regulatory actions during the drug lifecycle–a focus on benefits and risks. Expert Opinion on Drug Safety, 20(11), 1433-1442. https://doi.org/10.1080/14740338.2021.1952981
Bloem, L. T., Vreman, R. A., Peeters, N. W. L., Hoekman, J., van der Elst, M. E., Leufkens, H. G. M., Klungel, O. H., Goettsch, W. G., & Mantel-Teeuwisse, A. K. (2021). Associations between uncertainties identified by the European Medicines Agency and national decision making on reimbursement by HTA agencies. Clinical and Translational Science, 14(4), 1566-1577. https://doi.org/10.1111/cts.13027

2019

Scholarly publications

Vreman, R. A., Bouvy, J. C., Bloem, L. T., Hövels, A. M., Mantel-Teeuwisse, A. K., Leufkens, H. G. M., & Goettsch, W. G. (2019). Weighing of Evidence by Health Technology Assessment Bodies: Retrospective Study of Reimbursement Recommendations for Conditionally Approved Drugs. Clinical Pharmacology and Therapeutics, 105(3), 684-691. https://doi.org/10.1002/cpt.1251
Bloem, L. T., Mantel-Teeuwisse, A. K., Leufkens, H. G. M., De Bruin, M. L., Klungel, O. H., & Hoekman, J. (2019). Postauthorization Changes to Specific Obligations of Conditionally Authorized Medicines in the European Union: A Retrospective Cohort Study. Clinical Pharmacology and Therapeutics, 105(2), 426-435. https://doi.org/10.1002/cpt.1169

2017

Other output

Bloem, L. T., Mantel-Teeuwisse, A. K., Leufkens, H. G. M., De Bruin, M. L., Klungel, O. H., & Hoekman, J. (2017). Risk factors associated with post-marketing changes in specific obligations of conditionally authorised products in the EU. Pharmacoepidemiology and Drug Safety, 26, 605. https://doi.org/10.1002/pds.4275

2016

Scholarly publications

Bloem, L. T., De Abreu Lourenco, R., Chin, M., Ly, B., & Haas, M. (2016). Factors impacting treatment choice in the first-line treatment of colorectal cancer. Oncology and Therapy, 4(1), 103–116. https://doi.org/10.1007/s40487-016-0020-4