About the Authors
Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
Institut de Recherches en Biologie Humaine et Moleculaire (IRIBHM), University of Brussels, Brussels, Belgium
The authors have declared that no competing interests exist.
LR, ACM, and HK conceived the study and designed the experiments. NL, M-AL, and PV performed the experiments involving fetal samples. LR, ACM, MW performed all other experiments. LR, ACM, and HK analyzed the data. LR, ACM, and HK wrote the paper.