1. Materno-Fetal and Obstetrics Research Unit; Department “Femme-Mere-Enfant”; Lausanne University Hospital; Lausanne Switzerland
2. Unit of Emerging Infectious Diseases; Institut Louis Malardé; Tahiti French Polynesia
3. Institute of Virology and Immunology; Mittelhäusern Switzerland
4. Department of Infectious Diseases and Pathobiology; Vetsuisse Faculty; University of Bern; Bern Switzerland
5. Reproductive Medicine Unit; Department “Femme-Mere-Enfant”; Lausanne University Hospital; Lausanne Switzerland