Gardner T W, Miller M L, Cunningham D, Blankenship G W
Department of Ophthalmology, Penn State University College of Medicine, Milton S. Hershey Medical Center, Hershey, PA 17033, USA.
Graefes Arch Clin Exp Ophthalmol. 1995 Oct;233(10):617-20. doi: 10.1007/BF00185281.