Table of contents

Brief communications

• Novel recessive locus for body mass index in childhood asthma (22 April, 2021)

  Sanghun Lee, Jessica Lasky-Su, Sungho Won, Cecelia Laurie, Juan Carlos Celedón, Christoph Lange, Scott Weiss, Julian Hecker
• Circulating microbial cell-free DNA is associated with inflammatory host-responses in severe pneumonia (22 April, 2021)

  Haopu Yang, Ghady Haidar, Nameer S Al-Yousif, Haris Zia, Daniel Kotok, Asim A Ahmed, Lily Blair, Sudeb Dalai, Sivan Bercovici, Carine Ho, Bryan J McVerry, Alison Morris, Georgios D Kitsios
• Chronic airflow obstruction and ambient particulate air pollution (11 May, 2021)

  Andre F S Amaral, Peter G J Burney, Jaymini Patel, Cosetta Minelli, Filip Mejza, David M Mannino, Terence A R Seemungal, Padukudru Anand Mahesh, Li Cher Lo, Christer Janson, Sanjay Juvekar, Meriam Denguezli, Imed Harrabi, Emiel F M Wouters, Hamid Cherkaski, Kevin Mortimer, Rain Jogi, Eric D Bateman, Elaine Fuertes, Mohammed Al Ghobain, Wan Tan, Daniel O Obaseki, Asma El Sony, Michael Studnicka, Althea Aquart-Stewart, Parvaiz Koul, Herve Lawin, Asaad Ahmed Nafees, Olayemi Awopeju, Gregory E Erhabor, Thorarinn Gislason, Tobias Welte, Amund Gulsvik, Rune Nielsen, Louisa Gnatiuc, Ali Kocabas, Guy B Marks, Talant Sooronbaev, Bertrand Hugo Mbatchou Ngahane, Cristina Barbara, A Sonia Buist
• Pulmonary fibrosis 4 months after COVID-19 is associated with severity of illness and blood leucocyte telomere length (29 April, 2021)

  Claire F McGroder, David Zhang, Mohammad A Choudhury, Mary M Salvatore, Belinda M D'Souza, Eric A Hoffman, Ying Wei, Matthew R Baldwin, Christine Kim Garcia
• Burden of nosocomial COVID-19 in Wales: results from a multicentre retrospective observational study of 2508 hospitalised adults (22 July, 2021)

  Mark J Ponsford, Rhys Jefferies, Chris Davies, Daniel Farewell, Ian R Humphreys, Stephen Jolles, Sara Fairbairn, Keir Lewis, Daniel Menzies, Amit Benjamin, Favas Thaivalappil, Chris Williams, Simon M Barry