Nicole Minetti attends a meeting at the Lombardy regional headquarters in Milan January 18, 2011. The prosecutors' document says that Minetti, a Lombardy regional official who was formerly Italian Prime Minister Silvio Berlusconi's dental hygienist, recruited "a significant number of young women, who prostituted themselves with Silvio Berlusconi." Minetti, who is also under investigation, denies the accusations. Berlusconi was under growing pressure to resign on Tuesday over a formal investigation into allegations paid for sex with several young women, including a 17-year-old nightclub dancerREUTERS/Alessandro Garofalo ( ITALY - Tags: POLITICS CRIME LAW)