About the Authors

Christer B. Malm

Christer.malm@umu.se

Affiliations Sports Medicine Unit, Umeå University, Umeå, Sweden, Winternet, Boden, Sweden

Nelson S. Khoo

Affiliation Sports Medicine Unit, Umeå University, Umeå, Sweden

Irene Granlund

Affiliation Sports Medicine Unit, Umeå University, Umeå, Sweden

Emilia Lindstedt

Affiliation Sports Medicine Unit, Umeå University, Umeå, Sweden

Andreas Hult

Affiliation Sports Medicine Unit, Umeå University, Umeå, Sweden

Competing Interests

The authors have a spin-off company (Pro Test Diagnostics) dedicated to developing a complementary test for the currently used blood passport. There are no patents, further products in development or marketed products to declare. 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: CBM AH. Performed the experiments: CBM AH IG. Analyzed the data: CBM AH IG NSK EL. Contributed reagents/materials/analysis tools: CBM AH IG. Wrote the paper: CBM AH IG NSK EL.