Shares of Athenahealth (ATHN) were up more than 1% in early trading Monday after the provider of tech services for the health care industry said it had reached agreement to acquire Epocrates (EPOC), a provider of mobile services for physicians, for $293 million in cash. The price comes to $11.75 a share, 22% above Epocrates' closing price Friday. Shares of Epocrates were up more than 21% early Monday, near 11.70. Athenahealth provides electronic