[1] Univ Bergen, Dept Clin Med, Bergen, Norway
[2] Haukeland Hosp, Hlth Bergen, Dept Neurol, Bergen, Norway
[3] UNSW Sydney, Ctr Big Data Res Hlth, Fac Med, Sydney, NSW, Australia
[4] Univ Iceland, Ctr Publ Hlth Sci, Fac Med, Reykjavik, Iceland
[5] Finnish Inst Hlth & Welf, Informat Serv Dept, Helsinki, Finland
[6] Norwegian Inst Publ Hlth, Dept Chron Dis & Ageing, Oslo, Norway
[7] Norwegian Inst Publ Hlth, Ctr Fertil & Hlth, Oslo, Norway
[8] Aarhus Univ, Ctr Integrated Register Based Res, CIRRAU, Aarhus, Denmark
[9] Aarhus Univ, Dept Econ & Business Econ, Natl Ctr Register Based Res, Aarhus, Denmark
[10] Karolinska Inst, Dept Neurobiol Care Sci & Soc, Stockholm, Sweden
[11] Univ Bergen, Dept Global Publ Hlth & Primary Care, Bergen, Norway
[12] Aarhus Univ Hosp, Dept Neurol, Aarhus, Denmark
[13] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[14] Natl Ctr Epilepsy SSE, Oslo, Norway