Travoprost 0.004% with and without benzalkonium chloride: a comparison of safety and efficacy.
Lewis RA, Katz GJ, Weiss MJ, Landry TA, Dickerson JE, James JE, Hua SY, Sullivan EK, Montgomery DB, Wells DT, Bergamini MV; Travoprost BAC-free Study Group.
Lewis RA, et al.
J Glaucoma. 2007 Jan;16(1):98-103. doi: 10.1097/01.ijg.0000212274.50229.c6.
J Glaucoma. 2007.
PMID: 17224758
Clinical Trial.