A $600,000 campaign by University of California-San Francisco medical group is designed to let as many as 160,000 managed-care members know that UCSF ended its relationship with Brown & Toland Physicians, San Francisco's largest medical group, and contracted with another group. Brown & Toland offices started handing patients letters telling them the UCSF advertisements are inaccurate, and the medical group's leadership also sent the UC Board of Regents a letter accusing UCSF of resorting to scare tactics and spreading "incorrect and disruptive" messages. UCSF officials have denied those accusations.