Acknowledgements
This study was sponsored by Allergan, and AbbVie Company. Neither honoraria nor payments were made for authorship. With the exception of Dr. Brin, other individuals at Allergan were not involved in the development of the manuscript with the author or the vendor. Allergan had the opportunity to review the final version of the manuscript and provide comments. The authors acknowledge the professional editorial assistance of Mary Ann Chapman, PhD in the preparation of this manuscript, which was funded by Allergan, an AbbVie Company.