20211104135100.0 BMJ paediatrics open. portico Portico 2017/2024 2024-03-26 Preserved : 2017: 1, 2018: 2, 2019: 3, 2020: 4, 2021: 5, 2022: 6, 2023: 7, 2024: 8 Preserved : 2017: 1(1), 2018: 2(1), 2019: 3(1, S 1), 2020: 4(1), 2021: 5(1, S 1), 2022: 6(1, S 1), 2023: 7(1, S 1, S 2), 2024: 8(1, S 1) Preserved BMJ Publishing Group Limited BMJ Paediatrics Open 2399-9772 2399-9772 2399-9772 BMJ paediatrics open BMJ paediatrics open. 2399-9772 2399-9772 BMJ paediatrics open 2399-9772 http://bmjpaedsopen.bmj.com/