JMIR J Med Internet Res Journal of Medical Internet Research 1438-8871 JMIR Publications Toronto, Canada v23i11e34625 34889759 10.2196/34625 Corrigenda and Addenda Corrigenda and Addenda Authorship Correction: International Changes in COVID-19 Clinical Trajectories Across 315 Hospitals and 6 Countries: Retrospective Cohort Study Weber Griffin M MD, PhD 1 https://orcid.org/0000-0002-2597-881X Zhang Harrison G HSDG 1 https://orcid.org/0000-0001-6679-1464 L'Yi Sehi PhD 1 https://orcid.org/0000-0001-7720-2848 Bonzel Clara-Lea MSc 1 https://orcid.org/0000-0001-5238-1413 Hong Chuan PhD 1 https://orcid.org/0000-0001-7056-9559 Avillach Paul MD, PhD 1 https://orcid.org/0000-0002-0235-7543 Gutiérrez-Sacristán Alba PhD 1 https://orcid.org/0000-0002-1245-198X Palmer Nathan P PhD 1 https://orcid.org/0000-0002-4361-207X Tan Amelia Li Min BSc, PhD 1 https://orcid.org/0000-0003-0623-6623 Wang Xuan PhD 1 https://orcid.org/0000-0002-0011-5663 Yuan William PhD 1 https://orcid.org/0000-0002-2682-0416 Gehlenborg Nils PhD 1 https://orcid.org/0000-0003-0327-8297 Alloni Anna PhD 2 https://orcid.org/0000-0003-4708-4822 Amendola Danilo F MSc 3 https://orcid.org/0000-0002-7812-5079 Bellasi Antonio MD, PhD 4 https://orcid.org/0000-0001-7830-1645 Bellazzi Riccardo MS, PhD 5 https://orcid.org/0000-0002-6974-9808 Beraghi Michele MS 6 https://orcid.org/0000-0003-2709-058X Bucalo Mauro MS 2 https://orcid.org/0000-0002-0407-6120 Chiovato Luca MD, PhD 7 https://orcid.org/0000-0001-7457-7353 Cho Kelly PhD 8 https://orcid.org/0000-0003-1727-7076 Dagliati Arianna MS, PhD 9 https://orcid.org/0000-0002-5041-0409 Estiri Hossein PhD 10 https://orcid.org/0000-0002-0204-8978 Follett Robert W BS 11 https://orcid.org/0000-0003-1618-2817 García Barrio Noelia MS 12 https://orcid.org/0000-0002-2789-8426 Hanauer David A MS, MD 13 https://orcid.org/0000-0001-6931-3791 Henderson Darren W BS 14 https://orcid.org/0000-0001-6198-1912 Ho Yuk-Lam MPH 8 https://orcid.org/0000-0003-3305-3830 Holmes John H MS, PhD 15 16 https://orcid.org/0000-0003-2167-3602 Hutch Meghan R BS 17 https://orcid.org/0000-0001-8130-9429 Kavuluru Ramakanth PhD 18 https://orcid.org/0000-0003-1238-9378 Kirchoff Katie MSHI 19 https://orcid.org/0000-0002-9552-7176 Klann Jeffrey G MEng, PhD 10 https://orcid.org/0000-0003-2043-1601 Krishnamurthy Ashok K PhD 20 https://orcid.org/0000-0002-3215-7622 Le Trang T PhD 15 https://orcid.org/0000-0003-3737-6565 Liu Molei MSc 21 https://orcid.org/0000-0003-1890-4449 Loh Ne Hooi Will MBBS 22 https://orcid.org/0000-0002-4114-1286 Lozano-Zahonero Sara PhD 23 https://orcid.org/0000-0002-9467-0018 Luo Yuan PhD 17 https://orcid.org/0000-0003-0195-7456 Maidlow Sarah AA 24 https://orcid.org/0000-0003-4421-6834 Makoudjou Adeline MD 23 https://orcid.org/0000-0002-2496-7086 Malovini Alberto PhD 25 https://orcid.org/0000-0003-2857-5773 Martins Marcelo Roberto MSc 26 https://orcid.org/0000-0001-8013-9632 Moal Bertrand MD, PhD 27 https://orcid.org/0000-0001-9197-721X Morris Michele BA 28 https://orcid.org/0000-0002-3255-5727 Mowery Danielle L PhD 15 https://orcid.org/0000-0003-3802-4457 Murphy Shawn N MD, PhD 29 https://orcid.org/0000-0002-1905-8806 Neuraz Antoine MD, PhD 30 https://orcid.org/0000-0001-7142-6728 Ngiam Kee Yuan MBBS, MRCS, MMed 31 https://orcid.org/0000-0001-5676-2520 Okoshi Marina P MD, PhD 32 https://orcid.org/0000-0001-7728-4505 Omenn Gilbert S MD, PhD 33 https://orcid.org/0000-0002-8976-6074 Patel Lav P MS 34 https://orcid.org/0000-0002-8626-137X Pedrera Jiménez Miguel MS 12 https://orcid.org/0000-0003-0187-3826 Prudente Robson A PhD 32 https://orcid.org/0000-0003-1175-1435 Samayamuthu Malarkodi Jebathilagam MD 28 https://orcid.org/0000-0003-0061-8196 Sanz Vidorreta Fernando J BS 11 https://orcid.org/0000-0001-7165-0949 Schriver Emily R MS 35 https://orcid.org/0000-0003-4522-1029 Schubert Petra MPH 8 https://orcid.org/0000-0002-6135-0173 Serrano Balazote Pablo MS, MD 12 https://orcid.org/0000-0003-2958-6319 Tan Byorn WL MBBS 36 https://orcid.org/0000-0002-1658-259X Tanni Suzana E MD, PhD 32 https://orcid.org/0000-0002-2587-2759 Tibollo Valentina MS 25 https://orcid.org/0000-0003-2687-3822 Visweswaran Shyam MD, PhD 28 https://orcid.org/0000-0002-2079-8684 Wagholikar Kavishwar B MBBS, PhD 10 https://orcid.org/0000-0002-6219-861X Xia Zongqi MD, PhD 37 https://orcid.org/0000-0003-1500-2589 Zöller Daniela PhD 23 https://orcid.org/0000-0001-9929-7403 The Consortium for Clinical Characterization of COVID-19 by EHR (4CE) 39 Kohane Isaac S MD, PhD 1 https://orcid.org/0000-0003-2192-5160 Cai Tianxi ScD The Consortium for Clinical Characterization of COVID-19 by EHR (4CE) 1
Department of Biomedical Informatics Harvard Medical School 10 Shattuck St Boston, MA, 02115 United States 1 6175488520 tcai@hsph.harvard.edu
https://orcid.org/0000-0002-5379-2502 South Andrew M MS, MD 38 https://orcid.org/0000-0002-3204-4142 Brat Gabriel A MPH, MD 1 https://orcid.org/0000-0003-3928-5931 Department of Biomedical Informatics Harvard Medical School Boston, MA United States BIOMERIS (BIOMedical Research Informatics Solutions) Pavia Italy Clinical Research Unit Botucatu Medical School São Paulo State University Botucatu Brazil Division of Nephrology Department of Medicine Ente Ospedaliero Cantonale Lugano Switzerland Department of Electrical, Computer and Biomedical Engineering University of Pavia Pavia Italy Information Technology Department Azienda Socio-Sanitaria Territoriale di Pavia Pavia Italy Unit of Internal Medicine and Endocrinology Istituti Clinici Scientifici Maugeri SpA SB IRCCS Pavia Italy Massachusetts Veterans Epidemiology Research and Information Center Veterans Affairs Boston Healthcare System Boston, MA United States Department of Electrical Computer and Biomedical Engineering University of Pavia Pavia Italy Department of Medicine Massachusetts General Hospital Boston, MA United States Department of Medicine David Geffen School of Medicine University of California, Los Angeles Los Angeles, CA United States Health Informatics Hospital Universitario 12 de Octubre Madrid Spain Department of Learning Health Sciences University of Michigan Medical School Ann Arbor, MI United States Department of Biomedical Informatics University of Kentucky Lexington, KY United States Department of Biostatistics, Epidemiology, and Informatics University of Pennsylvania Perelman School of Medicine Philadelphia, PA United States Institute for Biomedical Informatics University of Pennsylvania Perelman School of Medicine Philadelphia, PA United States Department of Preventive Medicine Northwestern University Chicago, IL United States Institute for Biomedical Informatics University of Kentucky Lexington, KY United States Medical University of South Carolina Charleston, SC United States Department of Computer Science Renaissance Computing Institute University of North Carolina at Chapel Hill Chapel Hill, NC United States Department of Biostatistics Harvard T.H. Chan School of Public Health Boston, MA United States Department of Anaesthesia National University Health System Singapore Singapore Institute of Medical Biometry and Statistics Faculty of Medicine and Medical Center University of Freiburg Freiburg Germany Michigan Institute for Clinical & Health Research Informatics University of Michigan Ann Arbor, MI United States Laboratory of Informatics and Systems Engineering for Clinical Research Istituti Clinici Scientifici Maugeri SpA SB IRCCS Pavia Italy Clinical Hospital of Botucatu Medical School São Paulo State University Botucatu Brazil Informatique et archivistique médicales unit Bordeaux University Hospital Bordeaux France Department of Biomedical Informatics University of Pittsburgh Pittsburgh, PA United States Department of Neurology Massachusetts General Hospital Boston, MA United States Department of Biomedical Informatics Hôpital Necker-Enfants Malade, Assistance Publique Hôpitaux de Paris University of Paris Paris France Department of Biomedical Informatics, Institute for Digital Medicine National University Health System Singapore Singapore Internal Medicine Department Botucatu Medical School São Paulo State University Botucatu Brazil Department of Computational Medicine & Bioinformatics, Internal Medicine, Human Genetics, and Public Health University of Michigan Ann Arbor, MI United States Division of Medical Informatics Department of Internal Medicine University of Kansas Medical Center Kansas City, KS United States Data Analytics Center University of Pennsylvania Health System Philadelphia, PA United States Department of Medicine National University Health System Singapore Singapore Department of Neurology University of Pittsburgh Pittsburgh, PA United States Section of Nephrology Department of Pediatrics Brenner Children's Hospital, Wake Forest School of Medicine Winston Salem, NC United States see Authors’ Contributions Corresponding Author: Tianxi Cai tcai@hsph.harvard.edu 11 2021 30 11 2021 23 11 e34625 2 11 2021 10 11 2021 ©Griffin M Weber, Harrison G Zhang, Sehi L'Yi, Clara-Lea Bonzel, Chuan Hong, Paul Avillach, Alba Gutiérrez-Sacristán, Nathan P Palmer, Amelia Li Min Tan, Xuan Wang, William Yuan, Nils Gehlenborg, Anna Alloni, Danilo F Amendola, Antonio Bellasi, Riccardo Bellazzi, Michele Beraghi, Mauro Bucalo, Luca Chiovato, Kelly Cho, Arianna Dagliati, Hossein Estiri, Robert W Follett, Noelia García Barrio, David A Hanauer, Darren W Henderson, Yuk-Lam Ho, John H Holmes, Meghan R Hutch, Ramakanth Kavuluru, Katie Kirchoff, Jeffrey G Klann, Ashok K Krishnamurthy, Trang T Le, Molei Liu, Ne Hooi Will Loh, Sara Lozano-Zahonero, Yuan Luo, Sarah Maidlow, Adeline Makoudjou, Alberto Malovini, Marcelo Roberto Martins, Bertrand Moal, Michele Morris, Danielle L Mowery, Shawn N Murphy, Antoine Neuraz, Kee Yuan Ngiam, Marina P Okoshi, Gilbert S Omenn, Lav P Patel, Miguel Pedrera Jiménez, Robson A Prudente, Malarkodi Jebathilagam Samayamuthu, Fernando J Sanz Vidorreta, Emily R Schriver, Petra Schubert, Pablo Serrano Balazote, Byorn WL Tan, Suzana E Tanni, Valentina Tibollo, Shyam Visweswaran, Kavishwar B Wagholikar, Zongqi Xia, Daniela Zöller, The Consortium for Clinical Characterization of COVID-19 by EHR (4CE), Isaac S Kohane, Tianxi Cai, Andrew M South, Gabriel A Brat. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 30.11.2021. 2021

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 https://www.jmir.org/2021/10/e31400

In “International Changes in COVID-19 Clinical Trajectories Across 315 Hospitals and 6 Countries: Retrospective Cohort Study” (J Med Internet Res 2021 Oct 11;23(10):e31400), two errors were noted.

In the originally published paper, equal contribution of the last three authors was not noted. This has been corrected to add a note of equal contribution to the last three authors, as well as to add a statement to the Authors' Contributions section denoting the nature of equal contributions.

In the originally published paper, an equal contribution footnote was applied to authors Griffin M Weber, Harrison G Zhang, and Sehi L'Yi.

In the corrected paper, the equal contribution footnote has been applied to authors Griffin M Weber, Harrison G Zhang, Sehi L'Yi, Tianxi Cai, Andrew M South, and Gabriel A Brat.

The Authors’ Contribution section has been updated to include the following statement:

These authors contributed equally: GMW, HGZ, SL. These authors jointly supervised the work: TC, AMS, GAB.

The correction will appear in the online version of the paper on the JMIR Publications website on November 30, 2021, together with the publication of this correction notice.