Thanks, Joe. Good afternoon, everyone. For the fourth quarter of 2018, we recorded net product revenue of $73.4 million compared to $10.8 million in the prior year quarter and $70.2 million in the third quarter of 2018. For the fourth quarter of 2018, net product revenue was $18.4 million for Xtampza ER and $55 million for the Nucynta franchise. For the full-year 2018, net product revenue for Xtampza ER was $69.4 million and $211 million for the Nucynta franchise. Xtampza ER prescriptions and net revenue both grew by 8% during the fourth quarter compared to the third quarter of 2018. Nucynta revenue grew by 3% in the fourth quarter compared to the third quarter of 2018 due to a slight improvement in the gross-to-net discount. For the fourth quarter of 2018, we had net income of $9.1 million, compared to a net loss of $17.4 million for the prior year quarter. While revenue increased and SG&A expenses decreased in the fourth quarter compared to the third quarter of 2018, the improvement to net income was primarily driven by one-time accounting adjustments, of $18.3 million due to the amended Nucynta agreement. In order to supplement our GAAP financial supplement, we’ve included non-GAAP adjusted loss in our earnings press release and 10-K. We believe that the non-GAAP adjusted loss provides investors insight into management's view of the Company's core operating performance. The non-GAAP adjusted loss for the fourth quarter of 2018 was $3.4 million, which is an improvement of $4.9 million from the third quarter of 2018. As of December 31, 2018, our cash balance was $146.6 million, which exceeds our cash guidance of $145 million and represents an increase of $27.9 from the prior year and $6.8 million from September 30, 2018. As Joe stated, this marks the eighth consecutive quarter of improving cash flows after adjusting for stock offerings and term loan draw downs. As discussed on our third quarter call, the amended Nucynta commercialization agreement improves Collegium's net cash flow at all net revenue levels. Additionally, our yearend financial statements are simplified with removal of the asset acquisition obligation as well as the substantial reduction of the corresponding Nucynta intangible asset on our balance sheet. In 2019, Nucynta royalties will flow through cost of products revenues on our P&L within operating activities in our statement of cash flow. For additional details related to the amendment of the commercialization agreement, please refer to our 10-K filed with the SEC. Since this is our first conference call since we issued guidance on January 7th, we are reaffirming our previous guidance. For 2019, we expect Xtampza revenues between $95 million and $105 million, this implies Xtampza revenue growth of 37% to 51%, Nucynta revenue between $200 million and $210 million, and operating expenses, excluding cost of goods sold between $125 million and $135 million. Going forward, we do not plan on reaffirming guidance on our quarterly earnings calls. I will now turn the call over to Scott for commercial update.