Correction: Advanced care planning during the COVID-19 pandemic: ceiling of care decisions and their implications for observational data - Sam Straw; Melanie McGinlay; Michael Drozd; Thomas A. Slater; Alice Cowley; Stephe Kamalathasan; Nicholas Maxwell; Rory A. Bird; Aaron O. Koshy; Milos Prica; Peysh A. Patel; Samuel D. Relton; et al. (BMC Palliative Care, 2022)