[1] St Olavs Univ Hosp, Dept Neonatol, Trondheim, Norway
[2] Norwegian Univ Sci & Technol NTNU, Dept Clin & Mol Med, Trondheim, Norway
[3] Norwegian Univ Sci & Technol NTNU, Dept Publ Hlth & Nursing, Trondheim, Norway
[4] Linkoping Univ, Fac Hlth Sci, Div Microbiol & Mol Med, Dept Clin & Expt Med,Dept Clin Chem,Ctr Diagnost, Linkoping, Region Ostergot, Sweden
[5] Haukeland Hosp, Dept Pediat, Bergen, Norway
[6] Western Norway Univ Appl Sci, Fac Hlth & Social Sci, Bergen, Norway
[7] Trondheim Reg & Univ Hosp, St Olavs Hosp, Clin Clin Serv, Trondheim, Norway
[8] Norwegian Univ Sci & Technol NTNU, Dept Neuromed & Movement Sci INB, Trondheim, Norway
[9] St Olavs Univ Hosp, Dept Ophthalmol, Trondheim, Norway