J. Wachelder

Organisation of internal medicine in acute care in the Netherlands: a detailed overview.

P. Nanayakkara, M. Kremers, J. Wachelder, 2020, The Netherlands journal of medicine.

Outcome of elderly emergency department patients hospitalised on weekends - a retrospective cohort study

J. Dieleman, H. Haak, S. Brouns, 2018, BMC Emergency Medicine.

Association of socioeconomic status with outcomes in older adult community-dwelling patients after visiting the emergency department: a retrospective cohort study

P. Stassen, M. Aarts, H. Haak, 2017, BMJ Open.

Elderly emergency patients presenting with non-specific complaints: Characteristics and outcomes

J. Dieleman, P. Stassen, H. Haak, 2017, PloS one.

Unplanned readmissions among patients presenting with nonspecific complaints.

C. Nickel, J. Kellett, H. Haak, 2018, European journal of internal medicine.