[1] Natl Ctr Epilepsy Sandvika, Adult, Sandvika, Norway
[2] Oslo Univ Hosp, Dept Med Biochem, Hormone Lab, Oslo, Norway
[3] Oslo Univ Hosp, Dept Med Genet, Oslo, Norway
[4] Oslo Univ Hosp, Dept Nutr, Oslo, Norway
[5] Natl Hosp Norway, Oslo Univ Hosp, Dept Neurol, Oslo, Norway