I am a champion of Marketing even before you develop a product. So, I say....market through multiple channels while getting cooperation and assistance for clinical trails. Start this from day one and continue through the life of the product. Data is king in this field. Get the data and use it in your marketing. Determine if you would be willing to sell your product to a larger player and cash out with or without a royalty agreement or if you want to manufacture it yourself - you'll need lots of money for this route. Consider financing and investors.
Good Luck!
Michael T. Irvin
NoHogWashMarketing.com
"Get To The Top Without The Slop"
michaelirvin.net