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Letters
Authors’ response to Control issues
  1. Hanspeter Esriel Killer1,2,
  2. Gregor Peter Jaggi1
  1. 1Department of Ophthalmology, Kantonsspital Aarau, Aarau, Switzerland
  2. 2University Eye Clinic, University of Basel, Switzerland
  1. Correspondence to Prof. Dr. Hanspeter Esriel Killer, Department of Ophthalmology, Kantonsspital Aarau, Buchserstrasse, Aarau 5001, Switzerland; killer{at}ksa.ch

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We appreciate the thoughtful comment on our paper ‘Cerebrospinal fluid exchange in the optic nerve in normal-tension glaucoma’1 and we definitely agree, as mentioned in our paper, that a control group of normals would be desirable in the evaluation of this problem. However, as cisternography is invasive, we could not set up a gender-matched group of normals, but were at least able to …

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