[1] Ankara Univ, Fac Med, Dept Ophthalmol, TR-06100 Ankara, Turkey
[2] Dr Sami Ulus Childrens Hosp, Ankara, Turkey
[3] Ankara Univ, Fac Med, Publ Hlth Low Vis Rehabil & Res Ctr, TR-06100 Ankara, Turkey
[4] Ankara Univ, Fac Med, Dept Resp Med, TR-06100 Ankara, Turkey