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West KP Jr, Khatry SK, LeClerq SC, Adhikari R, See L, Katz J, Shrestha SR, Pradhan EK, Pokhrel RP, Sommer A.West KP Jr, et al.Bull World Health Organ. 1992;70(6):733-9.Bull World Health Organ. 1992.PMID: 1486669Free PMC article.Clinical Trial.
Quigley HA, Katz J, Derick RJ, Gilbert D, Sommer A.Quigley HA, et al.Ophthalmology. 1992 Jan;99(1):19-28. doi: 10.1016/s0161-6420(92)32018-4.Ophthalmology. 1992.PMID: 1741133Free article.
Katz J, Sommer A, Gaasterland DE, Anderson DR.Katz J, et al.Arch Ophthalmol. 1991 Dec;109(12):1684-9. doi: 10.1001/archopht.1991.01080120068028.Arch Ophthalmol. 1991.PMID: 1841576
Sommer A, Tielsch JM, Katz J, Quigley HA, Gottsch JD, Javitt J, Singh K.Sommer A, et al. Among authors: katz j.Arch Ophthalmol. 1991 Aug;109(8):1090-5. doi: 10.1001/archopht.1991.01080080050026.Arch Ophthalmol. 1991.PMID: 1867550
Sommer A, Katz J, Quigley HA, Miller NR, Robin AL, Richter RC, Witt KA.Sommer A, et al.Arch Ophthalmol. 1991 Jan;109(1):77-83. doi: 10.1001/archopht.1991.01080010079037.Arch Ophthalmol. 1991.PMID: 1987954
Sommer A, Quigley HA, Robin AL, Miller NR, Katz J, Arkell S.Sommer A, et al.Arch Ophthalmol. 1984 Dec;102(12):1766-71. doi: 10.1001/archopht.1984.01040031430017.Arch Ophthalmol. 1984.PMID: 6508617