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To the Editor:
It has been called to my attention that we made a serious omission in not citing some important, previously published work, pertinent to the studies that we reported in the December, 1963, issue of this journal (Ames and Gurian: Electrical Recordings From Isolated Mammalian Retina Mounted as a Membrane, Arch Ophthal 70:837-891, 1963). In a paper published three years earlier (Sickel, W., et al: Elektroretinogramm der umströmten menschlichen Retina, Ber Deutsch Ophthal Ges 63:316-318, 1960), Dr. Werner Sickel and coworkers had described an ingenious experimental preparation in which a disc of human retina was suspended in a perfusion chamber between two layers of plastic mesh. Using this preparation, they had recorded ERG's with a- and b-waves and an off-response similar to those recorded in vivo. Dr. Sickel and his co-workers have used this preparation since in a number of important studies (eg, Sickel, W.: "Stoffwechsel und Funktion
Ames A. ELECTRICAL RECORDINGS FROM ISOLATED RETINA. Arch Ophthalmol. 1964;72(2):293. doi:10.1001/archopht.1964.00970020293029
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