About the Authors

Dan Norbäck

dan.norback@medci.uu.se

Affiliation Department of Medical Science, Occupational and Environmental Medicine, Uppsala University and University Hospital, Uppsala, Sweden

Jamal Hisham Hashim

Affiliations United Nations University-International Institute for Global Health, Kuala Lumpur, Malaysia, Department of Community Health, National University of Malaysia, Kuala Lumpur, Malaysia

Gui-Hong Cai

Affiliation Department of Medical Science, Occupational and Environmental Medicine, Uppsala University and University Hospital, Uppsala, Sweden

Zailina Hashim

Affiliation Department of Environmental and Occupational Health, Faculty of Medicine, and Health Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia

Faridah Ali

Affiliation Primary Care Unit, Johor State Health Department, Johor Bahru, Malaysia

Erica Bloom

Affiliations IVL Swedish Environmental Research Institute Ltd., Stockholm, Sweden, Department of Laboratory Medicine, Division of Medical Microbiology, University of Lund, Lund, Sweden

Lennart Larsson

Affiliation Department of Laboratory Medicine, Division of Medical Microbiology, University of Lund, Lund, Sweden

Competing Interests

Erica Bloom is employed by IVL Swedish Environmental Research Institute Ltd. There are no patents, products in development or marked products to declare. This does not alter the authors’ adherence to PLOS ONE policies for sharing data or materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: DN ZH JHH. Performed the experiments: DN ZH JHH GHC EB LL. Analyzed the data: DN GHC ZH JHH FA. Contributed reagents/materials/analysis tools: DN GHC ZH JHH LL EB. Wrote the paper: DN GHC ZH JHH FA LL EB.