| Abstract | In a recent shift in the health information landscape, large corporations are seeking an integral and transformative role in the management of health care information. The mechanism by which this transformation is likely to take place is through the creation of computer platforms that will enable patients to manage health data in personally controlled health records (PCHRs). Two types of large corporations are involved. Technology companies such as Google and Microsoft see business opportunities,1 whereas Fortune 100 companies in their role as employers2,3 see efficiencies and cost savings when patients can securely store, access, augment, and share their own copy . . . |