Evaluating associations between patient-to-nurse ratios and mortality, process of care events and vital sign documentation on paediatric wards: a secondary analysis of data from th... oleh Orsola Gawronski, Corrado Cecchetti, Emanuela Tiozzo, Marta Luisa Ciofi degli Atti, Massimiliano Raponi, Karen Dryden-Palmer, Christopher S Parshuram, George Tomlinson, Immacolata Dall'Oglio, Leah Szadkowski, Ari Robin Joffe