News bites: Off-label challenge, the Wal-Mart trend, and more

Drugmakers are challenging legal prohibitions against off-label marketing of medicines for uses not approved by the FDA, The Wall Street Journal reports.

Wal-Mart's decision to scale back coverage could be part of a trend, NPR reports.

The U.S. government glossed over cancer concerns as it rolled out airport X-Rays, ProPublica reports.

The antitrust attorney opposing the Express Scripts-Medco merger before the FTC lays out his case in a Hill op-ed.

The health law's rate review rules started this week for policies sold through association, CQ HealthBeat reports.