[1] VU University Medical Centre,Laboratory of Immunogenetics, Section Immunogenetics of Infectious Diseases, Department of Pathology
[2] VU University Medical Centre,Department of Gastroenterology
[3] Municipal Health Service in Amsterdam,Public Health Laboratory
[4] Academisch Ziekenhuis Maastricht,Department of Obstetrics and Gynaecology, Research Institute Growth and Development (GROW)
[5] and Maastricht University,STD outpatient clinic
[6] Municipal Health Service in Amsterdam,undefined