- An Xp22 microdeletion associated with ocular albinism and ichthyosis: approximation of breakpoints and estimation of deletion size by using cloned DNA probes and flow cytometry. Schnur, R.E., Trask, B.J., van den Engh, G., Punnett, H.H., Kistenmacher, M., Tomeo, M.A., Naids, R.E., Nussbaum, R.L. Am. J. Hum. Genet. (1989)