[1] Univ Gothenburg, Sahlgrenska Acad, Dept Clin Neurosci, Inst Neurosci & Physiol, Gothenburg, Sweden
[2] Sahlgrens Univ Hosp, Dept Ophthalmol, Gothenburg, Sweden
[3] King Abdulaziz Univ Hosp, Dept Ophthalmol, Jeddah, Saudi Arabia
[4] Univ Gothenburg, Sahlgrenska Acad, Inst Clin Sci, Dept Pediat, Gothenburg, Sweden