Postdoctoral Fellows

Year Entered: 2023
Previous Degrees: PhD, Public Health and Epidemiology; University of Copenhagen; 2023
MPH, Nutrition; Loma Linda University; 2013
BSc, Health Sciences; King Saud University; 2007
Advisor: Johannes Thrul, PhD
Research Interests: My research focuses on physical and mental health interventions to improve physical behaviors and overall well-being. I am passionate about leveraging digital health tools, such as wearables and smartphones, to promote health and explore the impact of digital media use on mental, physical, and social health.
Email: salomai2@jh.edu 

Select Publications:

1. Alomairah, S. A., Knudsen, S. d. P., Roland, C. B., Molsted, S., Clausen, T. D., Bendix, J. M., Løkkegaard, E., Jensen, A. K., Larsen, J.E., Jennum, P., & Stallknecht, B. (2023). Effects of two physical activity interventions on sleep and sedentary time in pregnant women. International Journal of Environmental Research and Public Health, 20(7), 5359. https://doi.org/10.3390/ijerph20075359
2. Knudsen, S. d. P., Alomairah, S. A.*, Roland, C. B., Jessen, A. D., Hergel, I. M., Clausen, T. D., Larsen, J. E., van Hall, G., Jensen, A.K., Molsted, S., Bendix, J. M., Løkkegaard, E., & Stallknecht, B. (2022). Effects of structured supervised exercise training or motivational counseling on pregnant women’s physical activity level: FitMum - Randomized Controlled Trial. Journal of Medical Internet Research, 24(7), e37699. https://doi.org/10.2196/37699
3. Shi, J., Tan, J. J. M., Ong, H. E., Aljuboori, D., Alomairah, S., Colder Carras, M., & Thrul, J. (2024). Digital well-being in children and youth: Protocol for a comprehensive systematic review of reviews on interventions of problematic digital technology use. F1000Research. https://doi.org/10.12688/f1000research.149317.1 

Year Entered: 2024
Previous Degrees: DrPH, Health Systems Organization and Policy; Pennsylvania State University; 2023
MPAS, Public Policy and Analysis; Pennsylvania State University; 2019
BA, Global Policy; Chatham University; 2016 
Advisors: Sachini Bandara, PhD, and Brendan Saloner, PhD
Research Interest: My research interest lies at the intersection of substance use and policy, with a keen focus on overdose prevention and advancements in criminal justice reform. 
Email: Lblumbe3@jh.edu

Select Publications:

1. Blumberger, L., Calo, W., Mallinson, D. J., Liu, G., & Leslie, D. L. (2024). “Catching Chain” With Medicaid: The Impact of Medicaid Access on Opioid Overdose Mortality in Adults Released From State Detention. Psychiatric Research and Clinical Practice, 0(0). https://doi.org/10.1176/appi.prcp.20230080
2. Blumberger, L. (2024). Defying Convention. Psychiatric Services, 0(0). https://doi.org/10.1176/appi.ps.20240168

Year Entered: 2024
Previous Degrees: PhD, Feinberg School of Medicine, Northwestern University, 2024
MPH, School of Public Health, University of Alberta, 2016
CPH, Certified in Public Health, National Board of Public Health Examiners, 2016
Advisors: Johannes Thrul, PhD, and Ryan Vandrey, PhD
Research Interests: My research domains of interest are in addictions and substance use research. At JHU, I am working on a project developing a longitudinal observational research registry for the study of medicinal cannabis use and health - through the use of web-based surveys and ecological  momentary assessments. I am primarily interested on the health impacts of medicinal cannabis use on chronic pain and opioid use; and contributing to evidence-based guidelines for medicinal cannabis use. 
Email: cdubois6@jh.edu

Select Publications:

1. Dubois, C., Bobitt, J., Ding, L., Eurich, D. T., Knapp, A. A., & Jordan, N. (2024). The Association of Medical Cannabis Use with Pain Levels and Opioid Use in Illinois' Opioid Alternative Pilot Program. Substance use & misuse, 1–12. Advance online publication. https://doi.org/10.1080/10826084.2024.2383585
2. Dubois, C., Lunghi, C., Eurich, D. T., Dyck, J. R. B., Hyshka, E., Hanlon, J. G., & Zongo, A. (2024). Medical cannabis authorization and risk of emergency department visits and hospitalization due to psychotic disorders: A propensity score-matched cohort study. Schizophrenia research, 264, 534–542. https://doi.org/10.1016/j.schres.2024.01.029
3. Dubois, C., Fernandes, H., Lin, M., Martins, K. J. B., Dyck, J. R. B., Klarenbach, S. W., Richer, L., Jess, E., Hanlon, J. G., Hyshka, E., & Eurich, D. T. (2024). Benzodiazepine use in medical cannabis authorization adult patients from 2013 to 2021: Alberta, Canada. BMC public health, 24(1), 859. https://doi.org/10.1186/s12889-024-18356-6

Year Entered: 2024
Previous Degrees: PhD, Geography, University of Utah, 2024
Advisor: Johannes Thrul, PhD
Research Interests: mHealth; geographically explicit ecological momentary assessment; health systems research; health disparity; integrating spatial modeling and visualization techniques into public health research
Email: jhan94@jhu.edu

Select Publications:

1. Han, J., Wan, N., Horns, J.J., & McCrum, M.L. (In press). Application of community detection methods to detect EGS-specific regional networks. JAMA Network Open.
2. Cummins, M.R., Shishupal, S., Wong, B., Wan, N., Han, J., Johnny, J.D., Mhatre-Owens, A., Gouripeddi, R., Ivanova, J., Ong, T. and Soni, H.(2024). Travel distance between participants in US telemedicine sessions with estimates of emissions savings: observational study. Journal of Medical Internet Research, 26, e53437. doi: 10.2196/53437
3. Han, J., Wan, N., Brewer, S.C., & McCrum, M.L. (2023). Spatial access to Emergency General Surgery (EGS) services and EGS bypass behaviors in California. Annals of GIS, 1-11. https://doi.org/10.1080/19475683.2023.216554
4. McCrum, M.L., Wan, N., Han, J., Lizotte, S.L., & Horns, J.J. (2022). Disparities in spatial access to emergency surgical services in the US. JAMA Health Forum, 3(10):e223633. doi:10.1001/jamahealthforum.2022.3633 
5. McCrum, M.L., Wan, N., Lizotte, S.L., Han, J., Varghese, T., & Nirula, R. (2021). Use of the spatial access ratio to measure geospatial access to emergency general surgery services in California. Journal of Trauma and Acute Care Surgery, 90(5), 853-860. doi:10.1097/TA.0000000000003087