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Voor iedereen die wil weten wanneer NL meisjes gaan menstrueren "Trends in leeftijd eerste menstruatie 1955-2009" http://t.co/x6YwoDCWnP
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Trends in Menarcheal Age between 1955 & 2009 in the #Netherlands http://t.co/mWvms83O5y http://t.co/ziODFNnQEl HT @UtrechtUni
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Trends in Menarcheal Age between 1955 & 2009 in the #Netherlands http://t.co/PJjJGIfotR http://t.co/anmUsbRDwY HT @UtrechtUni
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Trends in Menarcheal Age between 1955 & 2009 in the #Netherlands http://t.co/PJjJGIfotR http://t.co/anmUsbRDwY HT @UtrechtUni
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Trends in Menarcheal Age between 1955 & 2009 in the #Netherlands http://t.co/fN56pEaHDr http://t.co/bA4SJfYQLE HT @UtrechtUni