[zer00eyz]

Years ago I worked for a bank who would often do UI research and focus groups.

Users, mortals, normal people would come in for a gift card and lunch.

Small business owners, C levels, non bank VP's had to be given (and im going to date myself) a palm V or something of equal value to come in....

Short of putting money on the table your response rates are HUGE. The question is are you getting the responses from the right/best segment of the industry. Remember your competing for their "attention" with every medical sales person out there, drugs, devices, marketing... "golf" is still a thing.

If you feel the need to add something into the mix: Build a News letter (head start on marketing. Run ad campaign (very targeted and expensive) and sign up form or survey (exclude all non dr's you capture).