Labor epidural analgesia and subsequent risk of offspring autism spectrum disorder and attention-deficit/hyperactivity disorder: a cross-national cohort study of 4.5 million indivi... by Hegvik, T-A, Klungsøyr, K, Kuja-Halkola, R, Remes, H, Haavik, J, D'Onofrio, B, Mätsä-Simola, N, Engeland, A, Fazel, S, Lichtenstein, P, Martikainen, P, Larsson, H, Sariaslan, A