The centre is led by Professor Lone Graff Stensballe from the Department of Paediatrics and Adolescents at Rigshospitalet. Below, you can read more about the centre's staff.

From left: Lone Graff Stenballe, Helene Christine Kildegaard Jensen and Pi Vejsig Madsen.
Lone Graff Stensballe
Lone is a paediatrician specialising in infections in children and a professor in paediatric vaccinology and infectious disease epidemiology. She holds a PhD, a Doctor of Medicine degree (DMSc), and an MPG (Master in Public Governance).
Lone works as a senior consultant and researcher, with expertise in vaccines, infections, epidemiology, and pharmacoepidemiology. Her research includes several large randomised clinical vaccine trials and long-term registry-based studies on side effects. Additionally, Lone serves as the chair of the Regional Scientific Ethical Committees in the Capital Region of Denmark.
Helene Kildegaard Jensen
Helene graduated as a doctor in 2015 and began her career in emergency medicine and endocrinology, followed by an introduction to paediatrics at the hospitals in Hvidovre and Kolding. Helene has previously worked as a research assistant at the Department of Emergency Medicine at Odense University Hospital and in Lund. She is currently working on a PhD in pharmacoepidemiology at the University of Southern Denmark and is also affiliated with the HCA Children's Hospital at Odense University Hospital.
At the centre, Helene works with handling registry data, implementing epidemiological methods, and acting as a liaison for clinical data.
Pi Vejsig Madsen
Pi holds a degree in mathematics and statistics from Aarhus University and has taught statistics courses alongside her studies. As a PhD student at the centre, Pi collaborates with the Biostatistics Department at the University of Copenhagen.
Pi primarily works on impact research, developing methods to evaluate Mary Elizabeth's Hospital with a focus on causal relationships using registry data. In addition to her research project, Pi assists with other projects at the centre and is part of the transitions project.
From left: Tobias Kragholm, Ann-Sophie Buchardt, Andreas Jensen and Amalie Bach Nielsen
Tobias Kragholm
Tobias holds a degree in bioinformatics and systems biology from the Technical University of Denmark. He has extensive experience in bioinformatics and data analysis, which he has applied in various contexts, including his master's thesis on severe chronic asthma in children and young people and his work as a research assistant at DTU, where he studied leukaemia in children and young people.
Tobias has experience in sequencing data analysis, including RNA-seq, ChIP-seq, and DNA-seq. At Mary Elizabeth's Hospital's Data Powerhouse, Tobias works as a PhD student mapping and understanding some of the long-term consequences of chronic illness in children and young people.
Ann-Sophie Buchardt
Ann-Sophie is a statistician with a PhD in biostatistics and bioinformatics from the University of Copenhagen. Her research has focused on the development of statistical methods for the analysis of high-dimensional (omics) data. Ann-Sophie has also worked on the validation of questionnaires and the development of tools for visualising survey data.
At the centre, Ann-Sophie works with data from the Danish health and social registers, clinical quality databases, and the Health Platform, with a focus on examining and tracking the development of hospitalisation, care, treatment, and socio-economic conditions and opportunities for hospitalised children, young people, and pregnant women in Denmark.
Andreas Jensen
Andreas holds a degree in mathematics and statistics from the University of Copenhagen. He completed his PhD at the University of Copenhagen, focusing on epidemiological cohort studies of 0-5-year-old Danish children using registry data. Andreas also has experience analysing data from randomised clinical trials and adverse event studies with long-term follow-up.
Andreas is employed as a senior researcher and is involved in several projects at the centre. His tasks include project management and supervision.
Amalie Bach Nielsen
Amalie graduated as a doctor from the University of Copenhagen in 2019 and worked as a junior doctor in Lung and Infectious Medicine as well as in general practice before starting her specialisation in a paediatric introduction post at the Department of Paediatrics and Adolescents at Rigshospitalet. Amalie also has research experience in paediatric leukaemia from a fellowship at UCSF and Stanford University in California, as well as in adult leukaemia at the Haematology Department at Rigshospitalet.
At MARYS' Data Powerhouse, Amalie is conducting PhD studies in our nationwide cohort of severely chronically ill children and their families, supplemented with qualitative interviews to incorporate patients' perspectives into the research and potential intervention studies.
Read more about the centre's projects