"A new law in Pennsylvania has doctors nervous."

"The law grants physicians access to information about trade-secret chemicals used in natural gas drilling. Doctors say they need to know what's in those formulas in order to treat patients who may have been exposed to the chemicals.

But the new law also says that doctors can't tell anyone else -- not even other doctors -- what's in those formulas. It's being called the 'doctor gag rule.'"

Susan Phillips reports for NPR's All Things Considered May 17, 2012. [2]