[TimAlerts] SEIN Micro cap Sientra (NASDAQ:SIEN) is up 40% premarket on increased volume in response to a published letter to doctors from Chairman & CEO Jeff Nugent saying that the company has submitted all of the third testing data of its products to the FDA. He says that, in the company's opinion, the results show that all are safe and present no significant risk to patients. If the FDA agrees, then their implants will be back on the market.