Shehadeh MM, Qaddumi J, Akkawi MT, Sadi D, Soboh AR, Khloof DR, Aghbar AA.
Efficacy of Combined Phototherapeutic Keratectomy, Wavefront-optimized Photorefractive Keratectomy and Corneal Collagen Crosslinking in the Management of Progressive Keratoconus over One-year Follow-up: Modified Athens Protocol. 
Int J Kerat Ect Cor Dis
2019;
8
(1):12-16.