1. Maeno A, Naor J, Lee HM, Hunter WS, Rootman DS. Three decades of corneal transplantation: indications and patient characteristics. Cornea. 2000;19(1):7–11.
2. Patton ME, Su JR, Nelson R, Weinstock H, Centers for Disease Controls, Prevention. Primary and secondary syphilis – United States, 2005–2013. MMWR Morb Mortal Wkly Rep. 2014;63(18):402–6.
3. Centers for Disease Controls, Prevention. Primary and secondary syphilis – United States, 1999. MMWR Morb Mortal Wkly Rep. 2001;50(7):113–7.
4. Leger F, Vital C, Negrier ML, Bloch B. Histologic findings in a series of 1,540 corneal allografts. Ann Pathol. 2001;21(1):6–14.
5. Schwartz GS, Harrison AR, Holland EJ. Etiology of immune stromal (interstitial) keratitis. Cornea. 1998;17(3):278–81.