| The Netherlands: health system review W Schäfer, M Kroneman, W Boerma, M Van den Berg, G Westert, ... World Health Organization. Regional Office for Europe, 2010 | 433 | 2010 |
| QUALICOPC, a multi-country study evaluating quality, costs and equity in primary care WLA Schäfer, WGW Boerma, DS Kringos, J De Maeseneer, S Greß, ... BMC family practice 12, 1-9, 2011 | 262 | 2011 |
| Is Credé’s prophylaxis for ophthalmia neonatorum still valid? UC Schaller, V Klauss Bulletin of the World Health Organization 79 (3), 262-266, 2001 | 218* | 2001 |
| Measures of quality, costs and equity in primary health care: instruments developed to analyse and compare primary health care in 35 countries WLA Schäfer, WGW Boerma, DS Kringos, E De Ryck, S Greß, ... Quality in primary care 21 (2), 67-79, 2013 | 178 | 2013 |
| The Netherlands: health system review W Schafer, M Kroneman, W Boerma, M van den Berg, G Westert, ... Health Syst Transit 12 (1), 1-228, 2010 | 124 | 2010 |
| The benefits of co-location in primary care practices: the perspectives of general practitioners and patients in 34 countries M Bonciani, W Schäfer, S Barsanti, S Heinemann, PP Groenewegen BMC health services research 18, 1-22, 2018 | 93 | 2018 |
| Two decades of change in European general practice service profiles: conditions associated with the developments in 28 countries between 1993 and 2012 WLA Schäfer, WGW Boerma, P Spreeuwenberg, FG Schellevis, ... Scandinavian journal of primary health care 34 (1), 97-110, 2016 | 80 | 2016 |
| Primary care practice composition in 34 countries P Groenewegen, S Heinemann, S Greß, W Schäfer Health Policy 119 (12), 1576-1583, 2015 | 76 | 2015 |
| Informing primary care reform in Greece: patient expectations and experiences (the QUALICOPC study) C Lionis, S Papadakis, C Tatsi, A Bertsias, G Duijker, PB Mekouris, ... BMC health services research 17, 1-13, 2017 | 58 | 2017 |
| General practitioners’ participation in a large, multicountry combined general practitioner-patient survey: recruitment procedures and participation rate PP Groenewegen, S Greß, W Schäfer International journal of family medicine 2016, 2016 | 56 | 2016 |
| Shared decision making between patient and GP about referrals from primary care: Does gatekeeping make a difference? AM Rotar, MJ Van Den Berg, W Schäfer, DS Kringos, NS Klazinga PloS one 13 (6), e0198729, 2018 | 55 | 2018 |
| Patient-perceived responsiveness of primary care systems across Europe and the relationship with the health expenditure and remuneration systems of primary care doctors AM Murante, C Seghieri, M Vainieri, WLA Schäfer Social Science & Medicine 186, 139-147, 2017 | 54 | 2017 |
| Communication between general practitioners and medical specialists in the referral process: a cross-sectional survey in 34 countries G Scaioli, WLA Schäfer, WGW Boerma, PMM Spreeuwenberg, ... BMC family practice 21, 1-9, 2020 | 48 | 2020 |
| Are people’s health care needs better met when primary care is strong? A synthesis of the results of the QUALICOPC study in 34 countries WLA Schäfer, WGW Boerma, MJ van den Berg, J De Maeseneer, ... Primary Health Care Research & Development 20, e104, 2019 | 47 | 2019 |
| GP practices as a one‐stop shop: How do patients perceive the quality of care? A cross‐sectional study in thirty‐four countries WLA Schäfer, WGW Boerma, FG Schellevis, PP Groenewegen Health services research 53 (4), 2047-2063, 2018 | 47 | 2018 |
| Healthcare assistants in EU member states: an overview M Kroezen, W Schäfer, W Sermeus, J Hansen, R Batenburg Health Policy 122 (10), 1109-1117, 2018 | 39 | 2018 |
| Priorities for health services research in primary care. W Schäfer, PP Groenewegen, J Hansen, N Black Quality in primary care 19 (2), 77-83, 2011 | 39 | 2011 |
| Stressed and overworked? A cross-sectional study of the working situation of urban and rural general practitioners in Austria in the framework of the QUALICOPC project K Hoffmann, S Wojczewski, A George, WLA Schäfer, M Maier Croatian medical journal 56 (4), 366-374, 2015 | 36 | 2015 |
| The association between the workload of general practitioners and patient experiences with care: results of a cross-sectional study in 33 countries WLA Schäfer, MJ van den Berg, PP Groenewegen Human Resources for Health 18, 1-9, 2020 | 35 | 2020 |
| Quality of primary health care in Poland from the perspective of the physicians providing it A Krztoń-Królewiecka, M Oleszczyk, WLA Schäfer, WGW Boerma, ... BMC family practice 17, 1-9, 2016 | 32 | 2016 |
