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2017 Feb; 32 2 418- 422 <a href=http://buycialis.autos>buy cialis online overnight shipping</a> For retinal flat mounts, four relaxing cuts 0, 90, 180, 270 were made on the edge of the neural retina and the flattened tissue was immobilized on a piece of nitrocellulose membrane Whatman, GE Healthcare Life Sciences, photoreceptor side down, as described previously Anastassov et al