Epocrates Inc. sued by shareholders Athenahealth, a provider of online services to doctors and hospitals, said Jan. 7 that it will pay $11.75 a share for San Mateo's Epocrates to gain an iPhone app and expand in electronic records. AUTOMOBILESPrius tops Civic in California salesToyota's Prius hybrid passed Honda's Civic to become the best-selling vehicle line in California, the largest U.S. auto market, for the first time as higher fuel prices and new versions of the car drove up demand. ENERGYChevron inks pacts with China's CnoocCnooc Ltd., China's largest producer of offshore crude oil and natural gas, said its parent company has signed two production sharing agreements with San Ramon's Chevron Corp. for blocks in the South China Sea.