About the Authors

Sandra Barragán

Affiliation Departamento de Estadística e Investigación Operativa, Universidad de Valladolid, Valladolid, Spain

Cristina Rueda

Affiliation Departamento de Estadística e Investigación Operativa, Universidad de Valladolid, Valladolid, Spain

Miguel A. Fernández

Affiliation Departamento de Estadística e Investigación Operativa, Universidad de Valladolid, Valladolid, Spain

Shyamal D. Peddada

peddada@niehs.nih.gov

Affiliation Biostatistics Branch, NIEHS (NIH), Research Triangle Park, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CR MAF SDP. Performed the experiments: SB. Analyzed the data: SB. Contributed reagents/materials/analysis tools: SB. Wrote the paper: SB CR MAF SDP.