Ensuring comparisons of health-care providers are fair: development and validation of risk prediction models for critically ill patients by David A Harrison, Paloma Ferrando-Vivas, Jason Shahin, Kathryn M Rowan

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Family-Reported Experiences Evaluation (FREE) study: a mixed-methods study to evaluate families' satisfaction with adult critical care services in the NHS by Stephen E Wright, Emma Walmsley, Sheila E Harvey, Emily Robinson, Paloma Ferrando-Vivas, David A Harrison, Ruth R Canter, Elaine McColl, Annette Richardson, Michael Richardson, Lisa Hinton, Daren K Heyland, Kathryn M Rowan

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A nurse-led, preventive, psychological intervention to reduce PTSD symptom severity in critically ill patients: the POPPI feasibility study and cluster RCT by Paul R Mouncey, Dorothy Wade, Alvin Richards-Belle, Zia Sadique, Jerome Wulff, Richard Grieve, Lydia M Emerson, Chris R Brewin, Sheila Harvey, David Howell, Nicholas Hudson, Imran Khan, Monty Mythen, Deborah Smyth, John Weinman, John Welch, David A Harrison, Kathryn M Rowan

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Improving risk prediction model quality in the critically ill: data linkage study by Paloma Ferrando-Vivas, Manu Shankar-Hari, Karen Thomas, James C Doidge, Fergus J Caskey, Lui Forni, Steve Harris, Marlies Ostermann, Ivan Gornik, Naomi Holman, Nazir Lone, Bob Young, David Jenkins, Stephen Webb, Jerry P Nolan, Jasmeet Soar, Kathryn M Rowan, David A Harrison

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