Treatment of bacterial vaginosis. A perspective, controlled study on efficacy and safety of intravaginal quaternary ammonium antimicrobial compounds versus clindamycin 2% intravaginal cream,LA TERAPIA DELLE VAGINOSI BATTERICHE. STUDIO CLINICO PROSPETTICO SULL'EFFICACIA E TOLLERABILITA DEI SALI QUATERNARI D'AMMONIO VERSUS CLINDAMICINA