[1] Gothenburg Univ, Sahlgrens Univ Hosp, Inst Clin Neurosci, Sect Ophthalmol, SE-43180 Molndal, Sweden
[2] Gothenburg Univ, Sahlgrens Univ Hosp, Dept Clin Chem & Transfus Med, SE-43180 Molndal, Sweden
[3] Univ Tartu, Dept Human Biol & Genet, EE-50090 Tartu, Estonia
[4] Univ Tartu, Dept Ophthalmol, EE-50090 Tartu, Estonia
[5] Gothenburg Univ, Fac Med, Dept Anat & Cell Biol, Gothenburg, Sweden
[6] Gothenburg Univ, Sahlgrens Univ Hosp, Inst Clin Neurosci, Dept Expt Neurosci, SE-43180 Molndal, Sweden