Erratum for

• Still a place for aortic counterpulsation in cardiac surgery and patients with cardiogenic shock?

  Heringlake M, Berggreen AE, Paarmann H. Heringlake M, et al. Crit Care. 2021 Aug 31;25(1):309. doi: 10.1186/s13054-021-03673-8. Crit Care. 2021. PMID: 34461956 Free PMC article. Review.
• Advanced management of intermediate-high risk pulmonary embolism.

  Weinstein T, Deshwal H, Brosnahan SB. Weinstein T, et al. Crit Care. 2021 Aug 31;25(1):311. doi: 10.1186/s13054-021-03679-2. Crit Care. 2021. PMID: 34461959 Free PMC article. Review.
• Secondary infections in critically ill patients with COVID-19.

  Grasselli G, Cattaneo E, Florio G. Grasselli G, et al. Crit Care. 2021 Aug 31;25(1):317. doi: 10.1186/s13054-021-03672-9. Crit Care. 2021. PMID: 34461962 Free PMC article. Review.
• Management of acute metabolic acidosis in the ICU: sodium bicarbonate and renal replacement therapy.

  Yagi K, Fujii T. Yagi K, et al. Crit Care. 2021 Aug 31;25(1):314. doi: 10.1186/s13054-021-03677-4. Crit Care. 2021. PMID: 34461963 Free PMC article. Review.
• Tracheostomy for COVID-19: evolving best practice.

  Williams T, McGrath BA. Williams T, et al. Crit Care. 2021 Aug 31;25(1):316. doi: 10.1186/s13054-021-03674-7. Crit Care. 2021. PMID: 34461964 Free PMC article. Review.
• Acute kidney injury in ECMO patients.

  Ostermann M, Lumlertgul N. Ostermann M, et al. Crit Care. 2021 Aug 31;25(1):313. doi: 10.1186/s13054-021-03676-5. Crit Care. 2021. PMID: 34461966 Free PMC article. Review.
• Measuring vitamin C in critically ill patients: clinical importance and practical difficulties-Is it time for a surrogate marker?

  Rozemeijer S, van der Horst FAL, de Man AME. Rozemeijer S, et al. Crit Care. 2021 Aug 31;25(1):310. doi: 10.1186/s13054-021-03670-x. Crit Care. 2021. PMID: 34461968 Free PMC article. Review.
• To prone or not to prone ARDS patients on ECMO.

  Roca O, Pacheco A, García-de-Acilu M. Roca O, et al. Crit Care. 2021 Aug 31;25(1):315. doi: 10.1186/s13054-021-03675-6. Crit Care. 2021. PMID: 34461971 Free PMC article. Review.
• Monitoring and modifying brain oxygenation in patients at risk of hypoxic ischaemic brain injury after cardiac arrest.

  Skrifvars MB, Sekhon M, Åneman EA. Skrifvars MB, et al. Crit Care. 2021 Aug 31;25(1):312. doi: 10.1186/s13054-021-03678-3. Crit Care. 2021. PMID: 34461973 Free PMC article. Review.
• Pathophysiology and clinical implications of the veno-arterial PCO₂ gap.

  Ltaief Z, Schneider AG, Liaudet L. Ltaief Z, et al. Crit Care. 2021 Aug 31;25(1):318. doi: 10.1186/s13054-021-03671-w. Crit Care. 2021. PMID: 34461974 Free PMC article. Review.