Supporting Parents & Kids Through Lockdown Experiences (SPARKLE): a digital parenting support app implemented in an ongoing general population cohort study during the COVID-19 pand... by Kostyrka-Allchorne, K, Creswell, C, Byford, S, Day, C, Goldsmith, K, Koch, M, Gutierrez, WM, Palmer, M, Raw, J, Robertson, O, Shearer, J, Shum, A, Slovak, P, Waite, P, Sonuga-Barke, EJS