1. Market Scope. 2011 Comprehensive Report on the Global Dry Eye Products Market. St. Louis, Mo: Market Scope, November 2011.
2. Roach L. Rethinking meibomian gland dysfunction: How to spot it, stage it, and treat it. American Academy of Ophthalmology. 2011 July/Aug. Available at: http://www.aao.org/eyenet/article/rethinking-meibomian-gland-dysfunction-how-to-spot?julyaugust-2011. Accessed: 05/02/2016.