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Martin Hilber, Adriane; Hull, Terence H.; Preston-Whyte, Eleanor; Bagnol, Brigitte; Smit, Jenni; Wacharasin, Chintana; Widyantoro, Ninuk (2010). A cross cultural study of vaginal practices and sexuality: Implications for sexual health. Social science & medicine, 70(3), pp. 392-400. Amsterdam: Elsevier 10.1016/j.socscimed.2009.10.023
