1. Institute of Inflammation and Neurodegeneration, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
2. Division of Infectious Diseases, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
3. Department of Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
4. Institute for Microbiology and Hygiene, Charité Medical School, Berlin, Germany
5. Palo Alto Medical Foundation Toxoplasma Serology Laboratory, Palo Alto, California, USA
6. Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA