What is the relationship between pure and channel in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

So we're very first all of our channel checks that ophthalmologists are seeing Rhopressa and Rocklatan as the pure indications to some of the existing generic options, but we're also hearing prescribers are facing some challenges because you've been in cases where Rhopressa and Rocklatan are indicated as covered by a plan.

Answer: original_broadcaster