The state attorney general's office will hold a series of public hearings this week on the controversial sale of six nonprofit hospitals, including Seton Medical Center in Daly City and O'Connor Hospital in San Jose, to a for-profit Southern California company. The proposed sale of the hospitals, operated by the cash-strapped Daughters of Charity Health System of Los Altos, to Prime Healthcare Services in Ontario (San Bernardino County) has pitted unions against each other and prompted several Bay Area lawmakers to criticize the deal.