About the Authors

Jusak Nugraha

Affiliations Department of Clinical Pathology, Faculty of Medicine, Airlangga University/Dr. Soetomo Hospital, Surabaya, Indonesia, Tropical Disease Center, Airlangga University, Surabaya, Indonesia

Ferdy R. Marpaung

Affiliation Department of Clinical Pathology, Faculty of Medicine, Airlangga University/Dr. Soetomo Hospital, Surabaya, Indonesia

Frankie C. H. Tam

Affiliation IgGENE, Fotan, Hong Kong

Pak Leong Lim

pllim@iggene.com

Affiliation IgGENE, Fotan, Hong Kong

Competing Interests

F.C.H Tam and P.L. Lim are employees of IgGENE (HK), which has a work relaionship with IDL Biotech (Bromma, Sweden). TUBEX TF kits were obtained from IDL Biotech, through Pacific Biotekindo (Jakarta, Indonesia), as a gift. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JN PLL. Performed the experiments: FM FCHT. Analyzed the data: JN FM FCHT PLL. Contributed reagents/materials/analysis tools: JN FM FCHT PLL. Wrote the paper: JN FM FCHT PLL.