1. Epidemiology and Preventive Medicine, Medical College, Jagiellonian University, Krakow, Poland
2. Center for Children’s Environmental Health, Mailman School of Public Health, Columbia University, New York, New York, USA
3. Obstetrics and Gynecology, Medical College, Jagiellonian University, Krakow, Poland
4. Department of Environmental Health, School of Public Health, Harvard University, Boston, Massachusetts, USA
5. Southwest Research Institute, San Antonio, Texas, USA