About the Authors

Ann Thuring

ann.thuring@med.lu.se

Affiliation Department of Obstetrics and Gynecology, Clinical Sciences Lund, Lund University, Lund, Sweden

K. Jonas Brännström

Affiliation Department of Logopedics, Phoniatrics & Audiology, Lund University, Lund, Sweden

Maria Ewerlöf

Affiliation Department of Biomedical Engineering, Clinical Sciences Lund, Lund University, Lund, Sweden

Edgar Hernandez-Andrade

Affiliation Perinatology Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Wayne State University, Detroit, Michigan, United States of America

David Ley

Affiliation Department of Pediatrics, Clinical Sciences Lund, Lund University, Lund, Sweden

Göran Lingman

Affiliation Department of Obstetrics and Gynecology, Clinical Sciences Lund, Lund University, Lund, Sweden

Karina Liuba

Affiliation Department of Obstetrics and Gynecology, Clinical Sciences Lund, Lund University, Lund, Sweden

Karel Maršál

Affiliation Department of Obstetrics and Gynecology, Clinical Sciences Lund, Lund University, Lund, Sweden

Tomas Jansson

Affiliation Department of Biomedical Engineering, Clinical Sciences Lund, Lund University, Lund, Sweden

Competing Interests

Four of the authors (Jonas Brännström, Tomas Jansson, Karel Marsal and Ann Thuring) have in 2012 submitted a national patent application to The Swedish Patent and Registration Office. The application “Acoustic analysis and quantification of Doppler flow signals from the cardiovascular system” has been registered (patent pending number SE 1200357-0) and is being processed. The patent application is based on the material and results described in the present paper; however, the application is not in conflict with the PLOS ONE policies on sharing data and materials. Maria Ewerlöf, Edgar Hernandez-Andrade, David Ley, Göran Lingman and Karina Liuba have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AT KJB KM TJ. Performed the experiments: AT EHA DL GL KL KM TJ. Analyzed the data: AT KJB ME KM TJ. Wrote the paper: AT KJB ME KM TJ. Revised the manuscript: EHA DL GL KL. Approved the final version of the manuscript: AT KJB ME EHA DL GL KL KM TJ.