共 50 条
- [41] Oral cleanliness in daily users of powered vs. manual toothbrushes – a cross-sectional study BMC Oral Health, 19
- [43] Private vs. social returns to higher education: Some new cross-sectional evidence Journal of Labor Research, 2004, 25 : 677 - 686
- [44] Risk factors for bacterial vaginosis: results from a cross-sectional study having a sample of 53,652 women European Journal of Clinical Microbiology & Infectious Diseases, 2014, 33 : 1525 - 1532
- [46] Inconsistent condom use among Ugandan university students from a gender perspective: a cross-sectional study GLOBAL HEALTH ACTION, 2014, 7