The precision medicine initiative proposed by President Barack Obama last week would center on a huge new biobank containing medical records and genetic information for perhaps a million Americans. It would not be created from scratch by enrolling new volunteers, however, but would instead pull together existing studies into one giant database. That’s according to several scientists familiar with the broad outlines of the project who spoke on background with ScienceInsider. The biobank would be used for studies ranging from finding new disease-gene associations to working out how to use genomic and other molecular information in routine medical care. On...